Saturday, February 28, 2009
Friday, February 27, 2009
Sunset Cresent with added Venus
Two Crescents - Saturday February 28
Venus is rapidly closing in on the horizon, and you only have a couple of weeks before Venus is lost in the twilight. On Saturday the best time to look is between half and hour and an hour after Sunset.
Thursday, February 26, 2009
Blogging the Starry Messenger - The Telescope
After the introduction, Galileo goes on to describe how he built his telescope. First he describes briefly how he hear of telescopes that had been built elsewhere. Many people are under the impression that Galileo invented the telescope. He didn't, and he says so, but he produced far better telescopes than the ones that were circulating at the time.
Galileo's description of his telescope is frustratingly short. He takes a tube of lead and grinds two two lenses, sticks them in and "presto!", a telescope. Details of how long the tube was, how big the lenses were, what depth they were ground to etc. are all missing. Later on, when he says that to follow up his observations, you have to make an excellent telescope without flaws one wonders how you are supposed to do that. 17th century savants were a bit more "hands on" than modern day philosophers, but lens grinding was not a widespread skill amongst them (there were spectacle makers around, they could have asked them though). Even Kepler had to borrow a telescope to confirm Gailileo's observations, rather than make his own.
The lenses he describes will also be unfamiliar to those of us schooled in cartoon versions of the telescope. Most of ys think of telescopes as having an adjustable tube, and two convex lenses, like in this illustration. Galileo's lenses were flat on one side. One was spherically convex and one was concave, as shown in this illustration.
Also, by modern standards his telescope was way underpowered, his first scope was only 9x, about as effective as a pair of 10x50 binoculars, his best telescope was only 30x, around the power of many modern finderscopes. For most of his observations of the Moon he use a scope of around 15x magnification. The higest power magnification was impractical because of the small field of view.
Consier that not only did Galileo have a telescope that was low powered by todays standards, but there was no fancy andt-glare coatings, correction for abberation, a decent mounting or anything thing else. The quality and consistency of the glass available at the time was not as high as today. Yet Galileo made a telescope that could uncover the heavens.
What he does sepend a lot of time on (in his wondrfully convoluted fashion) is his mechanism for determining distances between stars in the telescope (a series of thin metal plates with different sized holes in them that could be placed in front of the lens). This is where Galileo stands out. He wasn't the first to make a telescope, he wasn't the first to turn the telescope to the sky. But he was the first to make a seroius instrument capable of aming reasobably accurate measurements of objects. This will turn out to be important in the discussion of Medicaian staleelites later on, and the very conduct of science.
Next week - The Moon!
Blogging the Starry Messenger - Introduction
Best of the Domefest
There were science education films, abstract films and wonderful little narratives. My favorite was "Dome sketch" which was just a series of abstract sketches, but absolutely wonderfully done. The Bettdeckrerschnappender weisle liked "Journey on a Snowflake", featuring singing H2O molecules and EldestOne liked "sciophobia" about ... well, you just have to see it.
Just don't do what I did, which was to leave the tickets at home. Talk about embarrassment (the Domefest folks were good about it though).
Details for getting tickets are here.
Tuesday, February 24, 2009
Yes, that blob is Saturn
Then of course the finder scope had been knocked out of alignment, so I spent handfuls of time aligning that. Then Saturn was just not turning up in the imager. Mucho adjustment later I work out that the focus is off.
By the time I get Saturn in focus, Titan is well and truly on the disk. But I can't see it, as Saturn is bouncing around like a drop of water on a hot plate. Turbulence, bad turbulence. I'm lucky even to see the rings. Still, it's obvious the ring are edge on, compare this to my 2007 image of Saturn below.
Even with the turbulence tonight's a better image. And you can clearly see how much the rings have closed up.
But still, no hope of seeing any of the moons, let alone Titan's shadow. Hope other folks did better.
The day after the Massing
It looked a lot more impressive to the eye.
Lulin and Saturn
Canon IXUS, 400 ASA, 15 seconds exposure. Again, blogger has put the image on the side, I don't know why.
Monday, February 23, 2009
The Moon, a few planets and a lot of cloud!
Well, of course it would happen that most of the sky was clear this morning, except that bit where the planetary massing occurred. Still I got to see the Moon and its attendants play peek-a-boo with the clouds, and through binoculars the earthshine look quite nice, with threads of cloud giving a dramatic effect. Mars was the hardest to pick up, being closer to the horizon where the cloud was. Did get some nice views of all 3 planets at various stages, and these two pictures (around 5:30 am and 6:00 am), capture some of those moments.
Comet Lulin this morning
Sunday, February 22, 2009
Adding Lulin to Stellarium and Celestia
For Stellarium, you have to add the comet details to the ssystem.ini file in the data folder (always make a backup of this file okay). When you run Stellarium, you will have to turn planet hints on in the configuration menu. Otherwise you won't be able to see Lulin (comets don't render correctly in the current version of Stellarium, but that is supposed to be fixed in the next version (which is just about to be released)).
Here the Lulin data I used, taken from Astronomy Log.
name = Lulin
parent = Sun
radius = 1000
oblateness = 0.0
halo = true
color = 1.0,1.0,1.0
tex_halo = star16×16.png
tex_map = nomap.png
coord_func = comet_orbit
orbit_TimeAtPericenter = 2454842.1414
orbit_PericenterDistance = 1.212289
orbit_Eccentricity = 0.999987
orbit_ArgOfPericenter = 136.8614
orbit_AscendingNode = 338.5353
orbit_Inclination = 178.3730
lighting = false
albedo = 1
If you want to make your own files for comets in the future, you can use the data sources I linked to in my post Making SSC Files for Celestia. Here is the data for a Lulin SSC file for Celestia. Note that it is slightly different from the Stellarium file in some items as I've used slighly different data sources.
======= 8< cut here 8< ==========================
# C/2007 N3 Lulin
EllipticalOrbit # elements for epoch 2009
Epoch 2454842.115631206611 #January 14.35 2009
# Epoch is actually the Julian date of perihelion
Period 28250000 #wild guess, but it works
Radius 10.45 # Hn=12.50 Hn=14.10-2.5*log(Albedo)-5*log(Radius) Albedo=0.04
Orientation [ 90 0 0 1 ] # random value
RotationPeriod 15.613880 # random value
Obliquity 77.387310 # random value
EquatorAscendingNode 239.190649 # random value
=========== 8 < cut here 8< =============================
The Lineup before the Massing
Carnival of Space #91 is here.
Labels: carnival of space
Saturday, February 21, 2009
Transit of Titan 2 - February 24
On February 24 there will be a second rare Transit of Titan across the face of Saturn. This time you will be able to see the shadow of Titan on Saturn (if you have a good enough telescope).
The shadow will be visible on Saturn about forty minutes before the transit starts. As well the Moons Mimas, Dione and Encladeus will transit not long after Titan, but you will need a 8” or better telescope to see the moons effectively. Even 4” reflectors and 50mm refractors will be able to see Titan enter Saturn's disk, although you will not be able to see Titan once it is on the disk, you may see its shadow. Mimas will start to transit about 40 minutes after Titan, and the other two about two and a half hours later (Note that the image on Mike Salaways page has Mimas in the wrong location. everything else is correct, I suspect StarryNight weirdness. Stellarium for example, has everything in the right place but one hour earlier!)
Eastern states: 10:26 pm AEDST
Central States: 10:00 pm ACDST
Western Australia: 8:29 pm AWDST
Eastern States: 2:25 am 25th AEDST
Central States: 1:59 am 25th ACDST
Western Australia: 11:29 am 25th AWDST
If you have Stellarium then cut out the following lines, and save it as Titan_Transit.sts
============ >8 cut here >8=================
date utc 2009:02:24T09:30:00
select planet Saturn pointer off
wait duration 2
zoom auto in
wait duration 2
zoom auto in
flag planet_names on
timerate rate 250
script action end
============ >8 cut here >8=================
Save the file in the Stellarium scripts folder, then run the script for an animation of the transit (without shadows). To rum the sript, in stellarium press M (menu) use the down arrow to get to 7. scripts, right arrow to get to select scripts, down arrow to pick up Titan_transit.sts, press enter them M, and sit back and watch.
And of course there is the real thing. Mike Salaway's animation and Christiopher Go's animation of the transits they observed. Go have a look.
Morning Glory - Moon, Mercury, Mars and Jupiter
You can start observing as early as 5:30 if you have a nice level horizon, and the sky will be pretty light by 6:30, so it will be hard to see Mars. So you have about an hours window in the morning to see this lineup at its best.
Looking on the 22nd will be pretty good too. The waning crescent Moon, Mercury Jupiter and Mars are all in a nice line.
Friday, February 20, 2009
Comet Lulin visits Saturn
Comet Lulin is now very easily visible in binoculars, with the waning Moon producing less sky brightness. I’ve been watching it for the past 3 mornings, but have not been sufficiently organised to do any sketching.
With in a few days the sky should be sufficiently dark for it to be visible to the unaided eye, even under most suburban skies (but not if you live in the inner city). Also, in the next few days the comet will be high enough above the horizon so that you can see it around 11 pm in the evening. The best views will still be in the early morning, but you now really don’t need to drag yourself out of bed early (unless you want to see the hijinks of Mercury, Jupiter and Mars that is).
Lulin is fairly hooting along now. In fact, if you have the patience, you can see it move through a binocular field over a couple of hours. Why not try and sketch its movement over a few hours of on night. Lulin is also getting brighter. Lulin will be at its brightest between the 20th and 25th of February, which will be a god time to see it. As well, on the 23rd and 24th of February, Lulin will be within a binocular field of Saturn, which should look rather nice. On the 24th there is also a rare transit of Titan, so this will be a good time to get the telescope out.
A printable black and white spotters map is here, and a printable binocular map, in the same orientation as the spotters map and showing Saturn and Denebola as orientation points, is here.
Spaceweather has a nice comet gallery of Lulin images.
Now that's an interesting use of a planetarium
There is both free and ticketed events, To quote the SOS website:
The best of DomeFest
David Beining, DomeFest Founder and Director, introduces his program of DomeFest highlights, curated especially for the AFF.
When: Wed 25 Feb, Thur 26 Feb, Sat 28 Feb, Sun 1 March; 6:00pm & 7:30pm
Where: Mawson Lakes Planetarium (bus leaves from outside the SA Museum)
How: $20/$15 (includes transport). Book via www.adelaidefilmfestival.org, 01300 727 432 or in person from the AFF Box Office adjacent to the Palace Cinema, 6 Cinema place (enter via Vaughan Place off Rundle Street).
FREE program features Celestial mechanics (Scott Hessels), Poème électronique (Le Corbusier & Edgard Varèse), and excerpts from Future memory (Amanda Phillips & Alexander Waite Mitchell)
When: Sat 21 Feb – Tues 24 Feb; daily between 4:00pm and 8:00pm
Where: South Australian Museum forecourt, North Terrace
How: Free. No bookings required, just drop in.
Thursday, February 19, 2009
Mercury, Mars and Jupiter in the Morning.
Mercury is the top bright object, Jupiter is the bright object below and too the right, and Mars is the faint dot just to right of Jupiter (click to enlarge).
Over the next few days Jupiter and Mercury come closer, cumulating in the spectacular massing of the crescent Moon on the morning of February 23rd.
Wednesday, February 18, 2009
More Historical Astronomy Book Blogging
Occultation of Antares - 18 February 2009
Going, going, going, almost gone. Antares disappears behind the Moon.
I had completely forgotten about the occultation of Antatres. It was only when I turned my binoculars to the Moon, after observing comet Lulin (a busy morning, Lulin, an occultation and Mars and Jupiter together) and saw Antares and the Moon close, did I realise that an occultation was on. The image sequence is from 6:10 am ACST to 6:26 ACST (by which time the sky was quite bright, coming close to the end of twilight). In the last image you can Just see Antares disappearing behind the Lunar limb.
All images were taken with my Canon IXUS and my 4" Newtonian, the first three with the 20 mm lens and the last with the 12 mm lens. Getting exposures right was a pain.
Cricket on Fire
Still, where else can you watch grown men being repeatedly and humorously hit in the groin with leather balls and raise money for charity? On the night there were about 8,500 spectators (not bad for something organised at ultra-short notice) and as of 9:30 pm last night they had raised $110,00 AUD (with more still to come).
Tuesday, February 17, 2009
Blogging the Starry Messenger - Introduction
So I thought to myself, it's the 400th anniversary of Gaielo looking through a telescope, why not blog Sidereus Nuncius (The Sidereal or Starry Messenger)? True, it was not published until 1610, but it was the first evidence that the Aristotelian world was finished, and the first step leading to the 'Two World Systems" and the collision with the Church. It also represented a revolution in how astronomy was done, and a large chunk of it relied on observations made in 1609.
Also, it's short. Slogging through page after page of archaic italian translated into twee Victorian English is mentally draining. You have to restrain the urge to shout "Come to the point already" after a page of waffle.
So I'll do a chapter of the Starry Messenger every week. Strictly speaking, it doesn't have chapters, but there are logical shifts in the content I can pretend are chapters. I'm using a 1960's translation by Edward Carlos, so how well the Italian is translated is unknown.
But I do love how the title page has each line in a different font and typeface, and then there is the language itself
AND PROPOSING THEM TO THE ATTENTION OF EVERY ONE,
BUT ESPECIALLY PHILOSOPHERS AND ASTRONOMERS,
And it goes on and on...
the Milky Way, and Nebulous Stars, but especially respecting
Four Planets ...
... and on and on, you expect it to end "..and that's not all! Every reader gets a set of steak knives!" Still, that was the style in those times, but it does read oddly to the modern mind.
Even odder is the dedication to Cosmo de' Medici, 6 pages of dedication! Galileo praises Cosmo in terms of such fawning fastidiousness that you half expect him to go "gollum, gollum". But again, in those times, overblown praise of the rich and powerful was de riguer, especially if they were your patron (or you wanted them to be your patron).
But in the middle of all this fulsom praise is this ticking timebomb:
"..while with one accord they [Jupiter and its Moons] complete all together mighty revolutions every ten years round the centre of the universe, that is, round the SUN."
Cheeky Galileo. Next week, the Telescope.
Monday, February 16, 2009
In the light of the great satellite smash, I though it would be interesting to direct you to the European Space Agencies article on Space Debris. Lots of good illustrations of the current situation, and how debris clouds evolve.
As pointed out by DaveP. If you download the latest version of Google Earth, it comes with maps of the deep ocean and Mars. Now Google has a flight simulator, and it also works in the Mars version.
So you can do cool things like fly a F16 down Valles Marinensis (or in my case, repeatedly crash, but hey!).
As Dave point out, the physics is all wrong, but who cares?
Carnival of Space #90 is here.
Labels: carnival of space
Sunday, February 15, 2009
Radio Australia Podcast Now Up.
On Local Radio Today
UPDATE: I thought the radio show went rather well. If you are interested in helping out with the Westall Secondary College, please contact me via email (follow the web links at Southern Skywatch) and I will put you in touch. I also had a chat with the talkback gardener Malcolm Campbell while waiting. The Bettdeckererschnappernder weisle is a big fan of his, and it turns out he's an amateur astronomer with some serious tripod mounted binoculars.
Saturday, February 14, 2009
Comet Lulin, Mercury, Mars and Jupiter 16-18 February
Currently the Moon is drowning out comet Lulin, however, in the next few days there will be a good opportunity to see this comet. On the 16th and 17th of February the comet will be within a binocular field of the bright star Spica, alpha Virginis. It is very easily seen in binoculars (the only fuzzy star near Spica), and may be visible to the unaided eye under dark sky conditions.
You of course need to get up early in the morning (between about 1:30 am 5:30 am) to see the comet.
This chart to the left (click to enlarge) is suitable for printing. It shows the comet in relation to Spica, the circle represents the field of view of 10x 50 binoculars.
While you are up, cast your gaze to the eastern horizon, Mercury is the obvious bright object above the horizon, Jupiter is the bright object just above the horizon and Mars is a fainter dot above Jupiter. Between the 16th and the 18th, Mars and Jupiter draw closer and are closest, half a fingerwidth apart, on the 18th (see image below).
The eastern horizon in the morning at 6:00 am ACDST Adelaide on the 18th (click to enlarge).
Keep on watching, on the 23rd there is a spectacular line up of Jupiter, Mercury, Mars and the crescent moon, and on the 24th, comet Lulin is in binocular range of Saturn, and should be visible to the unaided eye.
Politricians Refuse Scientific Advice (news at 11)
What is the report that has caused such vituperative offence? He has the temerity to recommend, based on the best scientific evidence available, that Ecstasy be down-graded from a Class A drug to a Class B drug. Note that, not "Ecstasy is safe" or that Ecstasy should be decriminalised, but that it be put into a category more appropriate to the level of harm it causes. The home secretary wants David to apologise stating "...that his comments went beyond the scientific advice that I expect from him as chair of the [council]". In other words, he didn't tell the home secretary what they wanted to hear.
Now people get passionate about drugs, the levels of emotion can rise high and swamp all logic. Ecstacy is associated with harm. In the UK, Ecstacy use  is associated with about 17 deaths per year. But to put that in perspective, in one year in the UK 500 people died from taking paracetamol. Actually, thats misleading, but then, so are the artilces that emphasise the absoulte number of deaths. Which was the point of presenting it this way. You should express the deaths in terms of the number of users. For paracetamol thats 3.1 deaths per million, and for Ecstacy its 27 per million. So Ecstacy is only 10 times more lethal than a common drug that can be obtained without prescrition. Put it anotherway, take Ecstacy, and you have a 0.003% chance of dying.
There are other harms associated with Ecstacy use, and the possibility of long-term damage, but the point is that the best available science shows that Ecsatcy is just not a Class A drug like Herion in tems of its harm (see here and here and here for a nice image of compartive harms). Read the report here. See also Davids article on "Equasy" to give you another handle of comparative harms.
The UK government wants to maintain ecstasy's class A status to avoid giving any impression that the drug is safe. But it is clearly not a Class A drug, and downgrading it to class B will not give the impression it is safe. The young adults who take these drugs are not stupid, and know that the government is exgaerating the risks, and will be more likley to ignore government advice. That can only be a bad thing for rational drug policy. The UK goverment should start by actually listening to what David has to say.
 Or at least ingesting tablets that people thought were Ecstacy, some of the deaths in Australia have been linked to contaminants, and in some cases the "Ecstacy" tablets were something else entirely.
 Risk perception is a tricky thing, obviously, if you are taking a drug to cure a life threatening illness, a small chance of drug related harm is acceptable. But if you are taking a pill just to make you happy one should expect a very low risk of harm, but how low. Is 0.003% chance of death low enough if it's your child taking the drug? (some people think drugs should have zero risk of harm under any circumstances but that is just not possible, any drug that actually does something physiologically, and has any effect, has a chance of interacting badly with the quirks of peoples metabolism). Even so, exagerating the risks of these drugs, and villifying researchers who point out a more rational assessmnet, is a stupid thing to do for a government.
Friday, February 13, 2009
SpaceWeather has the story, a great animation of the collision (2.3 Mb), and a link to the sound of radar pings off the debris. Real Time Satellite Tracking also has a nice animation. The Bad Astronomer discusses the maths of the collision here and here.
Over at meteorobs everyone is discussion whether the impact will result in re-entries with visible fireballs. Despite being at around 800 Km, studies of the FENGYUG 1 debris from the Chinese anti-satellite impact suggest that there may be a slow but steady rain of material over the years (about 10 Kg of material over 10 years, maybe the occasional fireball, but not a spectacular rain of fireballs).
Speaking of Education
Also, the latest issue of Evolution: Education and Outreach is now online. In line with celebrating the 200th anniversary of Charles Darwin's birth, it is a ‘Darwin’ issue. One paper of interest in light of my recent rant is Don’t Call it “Darwinism” by Eugenie C. Scott and Glenn Branch.
Nature also has a Darwin Day Special edition, with a lot of the content free. There is an interview with David Attenbrough, a special Nature Podcast and lots more.
Thursday, February 12, 2009
Bushfires and Astronomy Education
If anyone is interested in helping, please contact me and I will pass you on to the appropriate contact person.On Tuesday with the Gippsland bush fires, Westall Secondary Collegelost its school science telescope and all the astronomy equipmentamongst other buildings and equipment at our school campus at thetownship of Balook. After discussing this with my Research Sciencestudents, we considered that we need to work towards a replacement. Wecame up with an Arts - Technology project to work at turning our handstowards making our own low-power telescope as Galileo did. We wouldlike to use this technology to draw what we can see with our eyes,much as he did many years ago.Our school is already involved with the NASA CloudSat and GLOBEmissions With these projects we ground truth satellite images fromspace, collecting environmental data used with climate models. Acurriculum bridge to link new and old technologies that have helped usto change our view of the world and gives us a chance to celebrate thework by technologists, scientists and artists. We look forward to areplacement and engagement with some astronomy activities later in theyearIt would be great if we could run this as a larger, internationalproject and are calling for other interested people to join in.
The generosity of people in times of trial never ceases to astound me and fill me with warmth. Over at ScienceBlogs US-based Science Woman is hosting a fund raiser where anyone donation to the Australian Red Cross goes into the draw for two darwin T-shirts. Thanks Folks!
Reframing the Argument
Professor Frame is very erudite in this podcast, and I'm sure we could have a very good chat over a cup of coffee.
One thing he gets wrong is that, at the time of Darwin, most people didn't belive that the world was only 6,000 years old as per Bishop Ussher (to be fair, even Vic Stenger gets this wrong). Since Huttons work in the 18th Century, it was evident that the Earth was much older than 6,000 years old. How old was not clear, but values in the millions of years were bandied about. While at the beigings of the 19th century, the average working person may not have been familiar with this, the yariuos Mechanics Institutes promulgated the latest scientific ideas across all classes. In 1840, the wildy popular "Vestiges of Creation" came out, which had a decided old Earth perspective. Darwin sailed on his voyage with Lyles "Priciples of Geology", an old Earth textbook.
Still, aside from that off note, it's a nice little conversation, have a listen.
Wednesday, February 11, 2009
Darwin Day 2009
To get you started, try reading this essay by my mate John (and this one as well).
How To Visualise Constellations
MiddleOne: I think I have a way to see the constellation lines at night.
Me: What do you mean?
MO: How to join up the stars in the sky.
Me: You mean actually draw the constellation lines on the sky? How would yo do that?
MO: You'd fire rockets that leave burning fuel in the sky in lines.
Me: Sorry, how would the burning fuel stay up?
MO: It would be gas, burning gas, and it would stay up connecting the stars.
Me: That might work! Why not build a frame of wire in the shape of the constellation, coat that with petrol, set it alight and have a balloon carry it in front of the constellation.
EldestOne: That's silly Dad, you'd set everyone on fire, use glow sticks instead.
SO: Our arms and legs fall of, and then they melt, and then we get put back together and kill aliens.
Me, MO, EO: !!!!!!!!!!!
Labels: home life
I'm on Radio Again
More Bushfires From Space
As always, donations to the Red Cross can be made here.
Tuesday, February 10, 2009
Penumbral Lunar Eclipse 2009
After all the cloud that was about Monday and Tuesday, I thought I wouldhave no luck with the eclipse, but the clouds cleared the horizon (except for some thin haze early on) in time for the eclipse. Being a penumbral eclipse, where the Moon enters the outer part of Earth's shadow, the darkenng was slight, and only really observable in the later part of the eclipse, but very definitly there. It was beautiful, and I'm glad I stayed up to see it.
I also got to see saturn too for the first time this year. Floating with its rings edge on, Titan just beyon the rings. Beautiful too.
The images above were taken with my Canon IXUS on automatic with the flash turned off, held to the 20mm eyepiece of my unguided 4" newtonian.
Fantastic Images of the Titan Transit
Some Australians got to see it too, despite the wildfires and floods. See this IceinSpace Thread for images and animations.
Monday, February 09, 2009
A dedicated Darwinian would welcome imperialism, genocide, mass deportation, ethnic cleansing, eugenics, euthanasia, forced sterilisations and infanticide. Publicly, he advocates none of them.it briefly makes me want to grab him by the lapels and shout at him."Get a CLUE you fracking moron. If you are going to criticise Darwinism at least LEARN a minute skerrik about the theory you have the temerity to mouth off about. A "Darwinian" would not welcome any of those things because they make no fracking sense from an evolutionary point of view, which you would realise if you had spent one nanosecond learning about evolutionary biology. Go read this article which explains it in small words you might understand."
I will not though, if I do meet him, I will politely explain why he is wrong. But it peeves me that having spent decades trying to politely disabuse American creationists of their deep misunderstandings of evolutionary biology, a fracking Australian Professor WHO SHOULD KNOW BETTER (because we have a halfway decent education system here in Australia), comes out with a load of unmitigated nonsense. The rest of the article is pretty well rubbish too.
I don't mean to come on all PZ Myers here, rational dialogue between different viewpoints is my thing but Bishop Frame, how much effort would it have taken to walk over to the biology library and crack open a textbook, really. If I said "Christians should welcome cannibalism" (transubstantiation, eating the host, oh never mind) Christians would rightly jump all over my ignorance. So why can't the good Bishop at least do us biologists the courtesy of getting his biology facts just a teeny bit right.
Darwinism, no such thing (well, in the 50's it refered to a strict adaptionist view of naturla selection). It's evolutionary biology, and has been since the modern synthesis. What the heck is it with anti-evolution types that the keep on calling it "Darwinism", it's like calling Relativity "Newtonism" (ie WRONG)
 Imperialism? IMPERIALISM! WHat the heck does imperialism have to do with biology for fracks sake?
 I mean, I've kept my cool under torrents of scatological abuse, but eventually you reach your limit for nonsense.
Labels: Intelligent design
The Fires From Space
It was Sunday afternoon when Mum rang me, asking if our Victorian family members was okay. At the time, I hadn't heard the news, we had been huddling in the house to avoid the effects of the record heatwave, and I assumed she was asking how the heatwave was affecting the Melbourne clan, especially as SurferFamily has no airconditioning. I assured Mum all was okay and went back to the mundanities of washing up.
Then the Bettdeckererschnappender weisle came home, saying that bushfires had it Victoria and it was worse than Ash Wedensday. While BEW hunted out a TV channel, and I hit the online news. The news was worse than we feared. Having lived in Victoria, it was a shock to see places that we knew (we used to go to the ST. Andrews Markets for example) turned to ash. The BEW used to work in the area, it has been a very upsetting time.
The tragedy is all the more poweful as these areas are bushfire vetrans. Almost everyone was prepared for fire, and extra fire fighters were on duty. But no one was prepared for the savagery of the the firestorm (and we are used to bad bush fires). People who had taken all the right precautions, talked of the firstorms blasting into their houses and literally exploding their rooms.
We have been very lucky, none of our friends and relative have lost their lives, and our hearts go out to the families of those who have lost friends and loved ones. One of our family friends did lose their home and all their possession, but they have their lives, and the ability to start over.
Just a reminder, the Red Cross is accepting donations to provide disater relief in Victoria.
And the view from space? Here is the NASA earth observatory image (ironically, this page says "more than 30 people", currently the death toll stands at around 134). The bushfires aren't over yet, and with more heat coming, there is the possibility of worse to come. You can keep track of the south east Australian fires using the images produced by the Modis Rapid Response team.
If that is not enough, Northen Australia is suffering from severe flooding.
Carnival of Space #89 is here.
Labels: carnival of space
Sunday, February 08, 2009
Saturday, February 07, 2009
Comet Lulin in Libra
Currently Comet Lulin is not far from alpha Librae, a more or less nondescript star up from the head of Scorpio. This makes it fairly easy to find at the moment, as it is in binoculars range of of Alpha Librae. The sky map to left will help you find Alpha Librea (click to enlarge) and below to the left if a printable black and white map suitable for use with binoculars (click to enlarge).
You can also get some black and white printable charts here.
There are some nice images of Comet Lulin here and here. And here is an image of the cometary tail disconection event.
Friday, February 06, 2009
The Winners of the "Sketching the Sky" Competition
So go to the Competition Winners Website, and gaze upon the fine artwork there.
Thursday, February 05, 2009
Penumbral Eclipse of the Moon (9-10 February 2009)
The eclipse will be seen in the Pacific, New Zealand and Australia, as well as South East Asia.
Western Australia sees most of the eclipse on the 9th. The eclipse begins at 11:36 pm AEDST, 11:06 pm ACDST and 9:36 pm AWDST on the 9th.
Mid eclipse is 1:38 am AEDST, 1:08 am ACDST on the 10th and 11:38 pm AWDST on the 9th. The eclipse finishes on 3:39 am AEDST, 3:09 am ACDTS and 1:39 am AWDST. For states without daylight saving subtract an hour.
For people in Asia and New Zealand, see here for a map and contact timings in UT.
Transit of Titan
While transits of the Galilean satellites across Jupiter happen relatively often (about a few times a month or so that are observable from any one location), transits of the Moons of Saturn, especially Titan, are much rarer.
Roughly every 14-15 years however, when Saturn's Rings are edge on, there is a chance to see Titan transit Saturn. Mike Salway discusses this over on Ice In Space, and gives transit times. There is also an awesome animation that he made of an earlier transit.
Mikes time's are actually for when Titan is already crossing the disk. Those with small scopes (114 mm, 4") will not be able to see Titan as it crosses Saturn, but you can see Titan make contact and vanish. According to me, first contact times are:
12:15 am, AEDST Monday 9 February (eastern states, Queenslanders subtract an hour)
11:45 pm, ACDST Sunday 8 February (SA, NT subtract an hour)
10:15 pm AWDST Sunday 8 February (WA).
There are further transits on February 24 and March 12.
Wednesday, February 04, 2009
The Moonand Venus on New Years Eve (a Blast from the Past)
Top 100 Science Blogs (as ranked by Wikio)
*That's irony, any science blog listing that didn't have Pharyngula in at least the top 10 is badly wrong.
Tuesday, February 03, 2009
What the heck was that?
As I watched it slowly faded, going from about magnitude zero to magnitude 4 in around a minute (or a bit more). I couldn't see it moving though (or if it was it was moving vvveeerrryyy slowly.
It might have been a satellite, but its lack of movement suggests it wasn't, and neither Heavens Above nor the Skymap satellite database show anything in that region (just above mu Orionis) at around 20:50 ACDST. It might be some weird glint off a geostationary satellite, but I don't have access to geostationary satellite TLE files. I could also be a "point Meteor" where a meteor is coming into the atmosphere almost driectly along yor line of sight, although the slowlness of the fading seems to make this unlikley.
So a small mystery. Anyone able to shed any light?
I’m on Radio Australia.
I’ve done a number of interviews for radio in regard to astronomy (and only two in regard to my biological research [sigh]), and I thought I might share some of the things I learned as part of my experience. Who knows, your local radio station may ask you to give them a talk, I never expected it to happen to me, but it did. I've even been asked to speak more than once.
- Relax, the radio folks want to talk to you because they think what you do or know is interesting, and the listeners think it’s interesting. You know your stuff, the sky is your playground. It’s radio, so close your eyes and imagine you are out in your backyard, talking to a friend about what you love. Let your enthusiasm for your astronomy shine through.
- Prepare beforehand. Think about what you would say. Imagine how the interviewer can ask you different questions. The interview will almost always evolve in ways you can’t foresee, but the practise of imagining how things could go will mean you won’t freeze up when the interview heads off in its own direction. In one interview I ended up talking enthusiastically about exoplanets, when I had no inkling we would ever go in that direction.
- No matter how polished you are, there will come a time when you have a mental blank. I have a single sheet of paper next to me with a couple of dot points written on it to prod my memory if the brain cloud gets me. Key dates (no matter how well you know this, the date of the next Leonid meteor shower can evaporate in an instant during an interview), a couple of linking ideas and so on. Don’t put in too much detail, you will get lost trying to read it and this will distract from the interview (you are sharing a conversation with the interviewer, not reading a script). Just enough so that if you feel the brain cloud looming, you can flick your eyes to the side and pick up that key point or date that went blank.
- Sometimes, you will make a mistake. Once I was taking about a lunar eclipse, and I was asked about how the date of Easter was calculated. The dreaded brain cloud descended and I had to admit I hadn’t the foggiest idea. After all, it’s not something I do generally. Gracefully admit you do not know, and use that as a jumping off point to something you do know. Don’t let it throw you (on the other hand, someone rang in to ask if the Southern Cross could be used as a clock, and I had just written an article about that, so that was a score).
- Don’t be disappointed after the interview. I used to be; then I ran across people who had heard what I thought was the most dismal radio interview I had even given, and they thought it was great! There will always be things you leave out that you wanted to put in (I forgot to mention the 100 hours of Astronomy during the Radio Australia interview), and things that you think you could have said better, but most people will find what you said interesting and informative. You have made their days a little brighter by showing them a bit of the sky that you find so fascinating.
Labels: public outreach