Wednesday, November 30, 2005
This weeks fuzzy planet photos are ...
PT, the place Science refers its readers to...
Searching for Venus's Shadow.
Sunday December 4 the Moon and Venus are close together, should make a nice photo shot.
Monday, November 28, 2005
The rover Spirit has been on Mars for one Martian year (as of November 20, so this is a little late) and Opportunity will have completed its first Martian year on December 12. In celebration NASA have released simulation images showing the Rovers on Mars (3D models of the rovers mapped onto real images of the Martian surface), why not take in the slide show. They also have a summary of Spirits year on Mars. Go have a look.
Twinkle, Twinkle little star
Sunday, November 27, 2005
Hayabusa has done it again.
Tragically (well, not that tragically) I missed the live blogging of Hayabusa's 26 November descent to Itokawa. It looks like it was sucessful, and the team think there was successful surface sampling. We will have to wait for further analysis for confirmation.
IDiocy in our papers
Peter Coghlan's essay (God v science? Age 23//11/05) interested me, as I have written a book chapter on what Dr. Behe says can't occur, the evolution of bacterial flagella.
We should be wary of Dr. Behe's claims. At the recent Dover trial Behe revealed that he hasn't read the substantial literature on the biology of the systems he says is "irreducibly complex"(IC).
Evolutionary biologists predicted that fish would lack part of the
blood clotting system that Dr. Behe claims is IC. That prediction was confirmed, yet Dr. Behe still tells his audiences that the clotting system is IC. Behe claims that the component parts of the bacterial flagellum have no function outside the flagellum, yet these components do function outside the flagella as pumps, adhesion systems and to allow bacteria glide over surfaces. We also have evidence that part of the flagellum was originally part of a
secretory system. Dr. Behe ignores this.
IC depends on our ignorance of structures, not on our understanding of them. These examples show one reason why Intelligent Design is not science. While individual claims about flagella and clotting systems have been refuted, these refutations are ignored by ID proponents who continue as before.
Dr. Coghlan suggests this debate could be raised in senior high schools. But students barely have enough time to learn the core principles of biology. If we waste their time with a debate arising simply because ID proponents haven't read the relevant scientific literature, we do the students a grave disservice.
Ian Musgrave has authored a chapter on the evolution of the bacterial flagella in "Why Intelligent Design Fails" Rutgers University Press, 2005
I didn't expect my letter to get in. Back in August the Religious editor of the Age published an opinion piece lambasting scientists for "scientific fundamentalism". It also claimed ID was scientific and not religiously motivated. There were numerous errors of fact in that article, and I and others fired off letters pointing this out. None got published. I had an amiable correspondence with the Religion Editor, sent him my chapter, and he promised to pass on my letter pointing out the errors of fact to the letters editor. I sent it off to him ... and nothing happened. For the record, here is the letter about the August article.
In the Age Opinion page of 18 August, Religion Editor Barney Zwartz asks for a proper scientific debate on Intelligent Design Creationism. Scientists will welcome that, when the Intelligent Design Creationists produce some science, instead of recycling failed arguments and producing fancy DVD's. Almost every item of alleged fact in Mr. Zwartz's article is wrong. Intelligent Design was a carefully crafted response of the creationist movement after a series of court defeats prevented its teaching in US schools. Michael Behe is a Catholic, not a non-Christian, and he first presented his ideas in a creationist textbook. Most of the key players in the ID creationist movement are not scientists, but lawyers or philosophers. Furthermore, they are all conservative Christians who have openly spoken of their theological agendas. Rick Sternberg was not hounded out of his job as editor; he had already come to the end of his term as editor and retired. These are all matters of fact, and can be readily checked. The concern about ID creationism is because its proponents want it taught as science. The scientific opposition is due to real concern over the subversion of the process of science to teach something that has no evidential support.
Ian Musgrave; chapter contributor, '"Why Intelligent Design Fails", Rutgers University Press.
That letter only covered the most significant errors of fact. But no correction to even these errors was ever published. Now there are readers of the Age who seriously think that Behe is a non-Christian. The general public, listening to our media, will be under the impression that ID is science, and that it is being kept out by a conspiracy of scientific fundamentalists.
"A lie can circle the world while Truth is putting its boots on" writes Terry Prachette in ÂThe TruthÂ. This adage has never been more true than in the recent Australian encounters with Intelligent Design Creationism. This is how pseudoscience wins, but taking the issue to the media. The ID proponents can say all the nonsense they like, and real scientists can't get a word in because editors have other priorities that ensuring that nonsense gets corrected. Ordinary scientists are shut out by editors who think they have published enough articles on the subject.
In Terry Prachettes fantasy, a man with a printing press prints the truth against all odds, sadly, in Australia, getting the truth out remains a fantasy.
Saturday, November 26, 2005
Hayabusa has landed!
Plucky little Hayabusa keeps on keeping on. Despite losing most of it gyroscopes, losing the robot probe Minerva and being plagued with communications problems, Hayabusa succeeded in touching down on the asteroid Itokawa. This is the first probe ever to land on an asteroid, and is a ground breaking feat. Hayabusa didn't take any surface samples this time, but there will be a new attempt on 7.00 pm November 26th (Japanese Standard time, UTC +9, so that is around 9.00 pm AEDST and 8.30 pm ACDST). Check out the JAXA site to see if they do live blogging this time.
A problem I wouldn’t mind
The Antarctic in winter would seem to be a good place to watch the stars, the Antarctic plateau is high, and the air is very dry and unpolluted, there is no light pollution and 24hour darkness is a pretty good bonus. Unfortunately, visual wavelength telescopes at the South Pole have to contend with aurora. Yes, that’s right, frequent aurora disrupt visual observing. I feel so sorry for them
(the original article is at Nature, but you need to be a subsrcriber).
(But free at Nature is this amazing story about Volcanoes in Antarctica, with a pretty amazing image)
Friday, November 25, 2005
Man that was beautiful.
Thursday, November 24, 2005
Lazing on a Sunny Afternoon.
Here is a shot of the Sun as projected through a 50 mm refractor with a 6 mm objective (click the image to enlarge it). You can clearly see the major spot and its umbra, the subsidiary spot, and if you squint you can see the trail of small spots connecting the two. The picture doesn’t do the image justice. The spots were nicely in focus on the screen, but I just couldn’t get the camera to focus on them. This was at least in part due to the wind which was whipping the rig around. (the strange shadows are gunk on the main lens, have to clean that up). This was a case where pen-and-pecil sketching beat photography.
So here is the rig. The scope sunshield is made of a Pizza box lid (no expense spared). The projector system is two sets of dowling connected at right angles (glued and taped). A small square of stiff white cardboard was taped to the one arm of the dowling, and the other was taped to the body of the scope. One day when at the hardware store I will pick up some clamps to hold the dowling on properly, but tape is a quick and dirty solution.
Except in wind. I used a similar setup to watch the transit of Venus while my reflector was festooned with camera gear, and it worked perfectly. But this day there was a fair bit of wind, which played merry havoc with the projection screen, so it wouldn’t stay straight. Hopefully I’ll have something better rigged up next time.
Now here is the binocular setup. I’ve mounted the binoculars on a camera tripod (use old binoculars just in case the heat causes the lens to crack). Make sure you secure the binoculars firmly to the tripod (you can go to the hardware and get a bit of wood, a long screw and butterfly nut to make a clamp) or they will fall off and smash at an inconvenient moment. I put foil over one lens while aligning the binoculars, then I use the handy Pizza box as a sunshield.
Now, you may say, since I can’t look at the sun, how the heck can I align my scope or binoculars on the Sun. You use the shadow of the scope or binoculars. With the sunshield off you adjust the shadow of your scope or binoculars until it is of minimal size, then viola! The Suns image will appear, you can put the sunshield on and start observing.
This is my shot of the image formed by binocular projection. It's fairly lousy because the wind kept whipping away the screen i was using to project the image on. While not as good as the telescope projection image, you could still identify the major features.
The Horns of Venus
Speaking of Venus, via davep is this stunning page showing shadows cast by Venus.
Tuesday, November 22, 2005
What are you using to stack the images?
I shoot 2 second AVI’s at 30 frames per second with a QuickCam VC using Vega (gain setting 125, exposure time 3) and I use Registax 220.127.116.11 to select and stack the AVI frames. I manually remove bad frames, and use pretty plain vanilla settings for everything else (Linear wavelets, 1 step increments in layer 1 only, and I use a Lanczos filter). See the Registax 2.0 tutorial here (still applicable to Ver 3.0)
I don't know if this is specific to the Meade DSI, but they claim 50 images will get the quality to about 90%.
This is almost certainly true of the Meade DPI imager, but will depend of the quality of seeing. If seeing is not that flash, you may have to take more frames (and hand discard obviously bad frames). The lunar image to the right is a stack of 58 frames (I manually tossed two) in the original 320x120 format that the QC takes. It’s pretty good given there was a bit of turbulence about.
This image is a section of the above image expanded and processed in the same way as the Mars images. Still not bad but much muddier. This shows that I am pushing things to the limit with my setup.
A quick recap of stacking. Digital imaging has revolutionized astrophotography in ways we couldn’t imagine 10 years ago. With a traditional film camera, you need to expose an image for a modest length of time, bright Moonscapes don’t require much exposure time, but planetary images do require a bit of duration. During this time the atmosphere is jumping up and down and bouncing around. Your images end up looking smeared, not the crisp planetary views you see through your eyepiece. You need nights of exceptional clarity and stillness to get good images, even then you usually need to take more than one photo to get something respectable. The number of images you can take is limited by the amount of film you can afford, and at the end of the day you have one or two good images.
With digital imaging, you are limited by how much hard disk space you have. Taking 60 film shots a night is beyond my budget, but taking 600 digital images in a night is a snap. The other thing about taking multiple digital images is that you can stack them. Random noise cancels out, and the real image is reinforced. It also increases image depth, which is important in astrophotography. Stacking can produce stunning images, and with stacking amateur astronomers can produce images that were the province of professionals less than a decade ago. Of course, using an elderly webcam like I do, my pixel size is very limited compared to the newer webcams like the ToUCam. And no amount of stacking will compensate for out of focus images or poor collimation.
So how many images do you stack? The answer depends a lot on the noise in your camera. Webcams are rather noisy compared to dedicated imagers like the Meade DSI, or the Meade Lunar Planetary Imager. So you need to stack more with a webcam than a Meade imager. When conditions are bad you will need to stack more. For imaging the Moon and Jupiter, I’ve been using as few as 30 frames. The Moon images above were done with 58 frames as I said, and they look pretty cool (compare the expanded version above with Tom's Moon shot, they are not dissimilar, and have similar stacks). The Jupiter image was assembled as a stack of a mere 30 frames, the band structures are clear (and in the original you can see Jupiter’s Moons). My best Mars shot is shown at the same scale as Jupiter, and is a stack of around 45-50 frames (I had to toss quite a few, and as I said before, this was a good night). One problem is accurate registration. When the image is small and has few distinguishing features, it is harder to align then accurately. I could add on my 2x Barlow lens, but without a clock drive Mars would shoot out of frame so fast it would be hard getting any shots at all. To give you an idea of what some people will go to, this series of Mars shots was taken with an 8” SCT and represents a stack of 1200 frames per image! This amount of stacking is not untypical of the images created by QCUIAG enthusiasts.
So how much stacking? Unfortunately, you will have to experiment yourself. People with real imaging systems like the Meade DSI or LPI can go with the manufacturers recommendation. Webcam users? The more the merrier (to a limit, the QuickCam VC’s resolution is too poor for stacks of over a 100 frames to be of much use for small images like Mars).
Finally, the panel below is a comparison of images that I “just stacked” and those that I ruthlessly pruned of suspect frames. It would help if my eyesight was better. The 31/10 image improved substantially with pruning, the 31/10 image looks worse after pruning, and the other look only marginally better. Which goes to show that telescope conditions are still critical with all this fancy gadgetry.
Monday, November 21, 2005
My best Mars image yet!
I've lined up a selection of my Mars shots here. Apart from the fact that the early ones are really wobbly (I should go back and restack, being ruthless in discarding, this might make a little bit of improvement), you can see that Mars is gradually diminishing, as it recedes from us. One night I might try and get Mars rotating, if I can stay awake that long.
Friday, November 18, 2005
822 has been firing off more M class flares, but it is too early to tell if they will head our way and produce aurora.
Venus and Nunki
Good News Week
Wednesday, November 16, 2005
Occultation of the Pleiades
Check subtitle of blog. 'Nuff said. On the other hand, Australia beat Uruguay in the soccer, so we go into the World Cup for the first time since 1975, so it wasn't all bad.
Dione and Tethys, just amazing
What can I say, this image of Dione and Tethys across the rings of Saturn is just jaw droppingly amazing. If you want words, see this page for a description of what is going on and a link to a high resolution image. I'm just too stunned to write anything.
Monday, November 14, 2005
The Mountains of Creation
Remember the iconic Pillars of Creation in the Eagle Nebula? Well the Spitzer Space Telescope has spotted something to put the pillars to shame. The Mountains of Creation are massive pillars of gas in an area called W5 in Cassiopeia. They are 10 times the area of the Pillars of the Eagle Nebula. The relentless radiation form a massive star is eroding cool, neutral hydrogen into these finger-like extensions. Within the pillars new stars are being born, revealed here by Spitzers IR imaging.
The really cool thing is that the (false) red colour is due to the absorbance of infrared light by complex organic molecules, the things that are important for life. It might be that these complex compounds will seed planets newly formed around these juvenile stars, possibly leading to life developing of these nascent worlds, and that these will be truly Mountains of Creation. See more at this page and at Toms astroblog.
The Sun stirs again
After weeks of quietness, where the Sun has had only a few, or sometimes no, Sunspots, this big blighter (822) appears. It has already fired off 2 C class and two M class flares, and it might be capable of more. If it stays active when it rotates to a more geoeffective position, it might result in aurora.
Yes, another Mars shot
Sunday, November 13, 2005
Well, it's got a rocket in it.
 Especially as Smallest One wakes up bright, early and chirpy.
I have a cold. But I also have a boy turning two, so instead of doing the sensible thing and going to be early, I assisted in Smallest Ones birthday bash. In the process I pointed out daytime Venus to some of the adults, who were pretty amazed to see a planet in daytime, and a "footpath astronomy" session started. Footpath astronomy seems to be breaking out all over at the moment. Top of the Lawn and Stuart have had footpath encounters.
Well, the footpath astronomy didn't start immediately, first I had to do the barbie (which is more complicated than it sounds when you have to keep the vege barbecue away from the carnivorous barbecue while keeping industrial quantities of kids sausages [which appear to be made of sawdust and wallpaper paste] coming) and then dark had to fall, which takes longer now that daylight saving is upon us. But after the barbie was over, the telescope was wheeled out to the delight of adults and children.
The waxing Moon was fairly high in the sky, so we turned to that first, the crater Copernicus with its terraces was visible in high relief. We could see the ridges in the lava fields of Mare Imbrium and the mountains threw long shadows towards the terminator. Everyone was smitten by the stark beauty of the scene. Even if the kids were smitten momentarily, before rushing off to their games. My kids are quite blase about the telescope, seeing as I wheel it out at the drop of a hat, and all camping trips have telescope accompaniment.
After the splendors of the Moon, we turned to crescent Venus, which impressed the adults, most hadn't realised that Venus had phases, and I explained the significance of that. After a bit of cleaning up we finally turned to Mars. Mars wasn't high (it was a kids party after all, no one was staying late), so once again our friend turbulence came along as well. However, we could clearly see the dark bands and Syrtis Major on the limb. The kids came out again for this. A small round dot is quite hard for kids to see, as they don't have a feel for how thing should look in a scope, but they did see it, and were amazed at seeing our sister world. The adults were pretty impressed at seeing any detail at all.
Soon everyone had to go home, the party had lots of good memories to go home with (including my cool mega bubble mixture), and the sky views were one part of that.
Oh, and the constellation? It's luminescent dye from those luminescent circlets they sell at fairs. We had a batch that leaked, and I shot the drops that glowed on our floor. It was facing south though :-)
 Anyone who says "Oh, how could you miss out on you little boys birthday" has never tried to deal with several boisterous children without a functioning nose or throat.
 Man am I getting good at seeing Venus in the daylight. I no longer require the Moon as a "skymark" to find it. In the back yard I have several landmarks (posts an chimneys on the roof) which I can use to orient myself, and locate Venus pretty quickly. If you want to do it yourself, find a spot in you backyard where the sun is blocked from view in the early afternoon, and there is a good landmark (a tree or post). The wait for twilight, return to the same spot and note the position of Venus with respect to the landmark (you might want to use a ruler to get exact locations). You may want to check at various times as evening draws on, to be able to extrapolate Venuses position before sunset. Next day, return to the spot before Sunset, and look around the spot you have fixed with respect to the landmark. Venus should pop out at you fairly soon (make sure that the Sun is completely blocked from view to avoid eye damage)
Occultation of the Pleiades, November 16
The bad news is that it won't be very spectacular. The occultation takes place during the full Moon, when the brightness of the Mooon will drown out all but the brightest stars. It will also be visible only from the eastern and central states, Western Australia will miss out completely. It also starts shortly after Moon rise in all states, so the Moon will be low to the horizon. Nonetheless, there are a couple of reasonably bright stars that get covered and uncovered (Alcyone, Maia and Electra, depending on exactly where you are observing from), and this should be visible in binoculars, as well as small telescopes (but it almost certainly won't be an unaided eye event, unless you have exceptional eyesight).
Occultation times for various cities (NOT in daylight saving time, so daylight saving staes will have to add an hour) can be found at the Southern Skywatch Occultation page.
Thursday, November 10, 2005
Tuesday, November 08, 2005
Showering will never be the same again
More daytime Venus
And this afternoon was glorious after all the rain (at least we didn't get flooded like so many suburbs), Mercury is quite bright and is edging up to Antares. Should look very nice in a couple of days.
My students certainly think I'm scary
|You Are a Little Scary
You've got a nice edge to you. Use it.
I'm hardly scary at all, while to my dissapointment Wilkins and PZ are much scarier. Hey, I keep carnivourous plants and I answered "psychologist" as what I want to be when I grow up, how much scarier do you want?
Monday, November 07, 2005
Is there life on Mars?
The possibility of life on Mars has always fascinated us. There was Percival Lowell who interpreted Giovanni Schiaparelli's canalli to be water filled canals serving the Martian populace. The shifting dust patterns on Mars were interpreted as being due to seasonal changes in vegetation.
Then Mariner 4 flew past returning images of a battered frozen land. Barsoom was out.
But we still wondered about life on Mars. The Viking Landers had complicated instruments to look for life on Mars, and returned ambiguous results that are still being argued over.
Then came the Martian meteorite ALH84001, there were traces of organic chemicals, life-like isotope ratios and what looked intriguingly like microfossils. After lots of debate most researchers think that ALH shoes no clear signs of Martian life, but there is still ongoing debate.
Finally there was the excess of atmospheric methane. We have come a long way from Barsoom, but excess methane is an important clue. Methane is broken down very rapidly, and if there is substantial methane in Mars's atmosphere, it must be being produced. Methane can be produced in one of two ways 1) volcanism or 2) Living things (on Earth, burping cows are a major source of atmospheric methane). Not only does Mars have more methane than expected, but the methane is higher in certain regions, regions which correlate with water in the ground and above surface water vapor. This suggests that the methane is not from volcanic activity. There was also the suggestion that there was a lot of formaldehyde in Mar's' atmosphere, since formaldehyde was generated from methane, that implied that there was a lot more methane than could be accounted for by volcanism. However, the interpretation of the infrared spectrum is still open to doubt.
New data from the NASA infrared telescope facility also suggests that volcanism may not account for Mars's methane. They found no evidence of sulfur dioxide in the atmosphere, suggesting very low rates of volcanic outgassing which could not account for the levels of methane. Now, it is too early to declare Mars a wildlife reserve yet, and there are a number of possible non-volcanic geological systems which might produce methane, but at the very least it indicates that we should keep up the search for life on Mars. Bacterial flatulence may not be as exciting as Banth tracks, but it might just be the clue that will lead us to the first extraterrestrial life.
Sunday, November 06, 2005
A Mars a Day
Another shot of Mercury
Saturday, November 05, 2005
Venus is currently bright enough to see with the naked eye. But locating a not too bright dot in a field of bright blue can be difficult. If you have a guide, like the Moon, it can be a lot easier. At 6:30 pm ACST, the Sun was roughly 15 degrees from the local horizon. I used the house roof to obscure the Sun (always be very careful to avoid staring at the Sun to prevent damage to your eyes). Looked up about 40 degrees to find the Moon, which was a fairly obvious crescent, then 6 degrees above that (and slightly to the side) was a very obvious Venus.
You have a chance to find Venus easily in daylight tomorrow. Venus will be 5 degrees below the Moon. So an hour or so before the Sun sets, find a nice spot where the Sun itself is blocked from View, but there is a good clear northwest sky. Look up to about 3/4 of the way to the Zenith (70 degress or about 12 handspans) in a northwesterly direction and the crescent Moon should be obvious. Look below the Moon by about 4 finger widths (roughly 5 degrees) and Venus should be an obvious bright dot. Good Luck, and don't forget to avoid looking at the Sun.
Taurids for Guy Fawkes Night
Planets in the scope
Venus looks okay though (I'm still hanging out for a violet filter). If I can shoot an image a week I might be able to make a nice animation of Venus going into crescent phase (look at blog subtitle, yeah right).
The turbulence seemed less this time round, but Mars wasn't crisper. Not bad, but not a dramatic improvement. Here I contrasted stacking a 1 second AVI (30 frames) and a 2 second AVI (60 frames). Stacking was done in Registax. The only processing is tossing blurred frames and adjusting the wavelets to 10.5 (I have no idea what that means, I just do it and the image looks better). Given what was supposed to be in view (Sinus Meridiani), I'm pretty pleased at the level of detail I got.
This image is one of the 60 framers, stacked in Registax, resized with PaintShop Pro, gamma corrected to 0.8 to bring out more detail and an unsharp mask applied. It doesn't look to bad if I say so myself, but it is a bit artifical. I'll have another go tonight if possible.
Friday, November 04, 2005
Capturing Elusive Mercury
My original plan was to get the focus sorted out on the Moon, then quickly shift to Mercury and get some quick shots before being called upon to go out and purchase icecreams. This plan did not take account of the hordes of particularly viscous mosquitoes lusting for my corpuscles. Now, normally mosquitoes ignore me, going for the more piquant flesh of my Bettdeckererschnappender weisle. However, this mob wanted me. After doing the mosquito slappping dance and mass mosquito destruction, I got Mercury in my scope moments before it disappeared behind the roof of the house next door. I'll process the shots later, but I doubt they will be exciting.
But again it was a beautiful might, with the crescent Moon cradling Earthglow, next to red Antares, Mercury glittering not far below. The only thing needed to make this a perfect night was a can of industrial strength mosquito replellent, the kind that melts plastic (and yes, the icecreams were delicious).
Looking to the edge of the Universe.
Thursday, November 03, 2005
Shameless Self Promotion
Cosmos is also cool because it will publish a short story by my friend Chris Lawson. Don't know which issue it will turn up in though.
*I've been meaning to put it Cosmos and others in the links section for a while, really, but it took this to get me moving.
Speaking of house keeping, I have changed the comments so that you have to type in a computer generated line of text to get your comment up (a couple of you have found out already the hard way). Sorry about the extra layer of annoyance, but I was getting tired of deleting premium dog food comment spam (everyone else gets interesting spam, I get dog food, I suppose this is a comment on my cosmic significance).
Also, if you scroll down you will note I've added some publications to my left hand links section, Sky & Space because it is a fantastic magazine for Southern Hemisphere amateurs (and I write for them, still, despite my near terminal ignorance of the concept of a deadline, they are forgiving people). The Australian Astronomy Almanac because it is an incredible reference that I use all the time (and I won bronze in their web-site Olympics). Finally, Cosmos, and Australian-based science magazine that covers a wide range of good science pitched at a general audience.
Finally, I have got the Southern Skywatch page for November finished. Putting together the Pleiades occultation times was a bit time consuming, as I do cities that don't turn up in the standard almanacs, but Astronomy goes on in the centre and north of Brisbane. Check it out for a feast of November Sky highlights.
Oh yeah, if you have just got back from holidaying in the Simpson Desert, you may not know that Pluto has two more moons. Read about it here, here and here.
Wednesday, November 02, 2005
Itokawa as you have never seen it.
Run, don't walk, to Toms Astronomy blog for absolutely stunning images of asteroid Itokawa taken from the plucky little Hayabusa probe (and some encouraging news about the mission).
Mercury In the Scorpions Head
Venus is also currently withing binocular range of lots of beautiful clusters, so will be a fine sight in binoculars.
[later edit], Yeah, I messed up my dates. And I've had more than 6 hours sleep twice in a row.
Tuesday, November 01, 2005
Venus and Mars were all right last night
I also got a reasonable image of Venus as well, the image here is a time series showing Venus increasing in size and decreasing in phase. If all goes well I might be able to get the crescent phases of Venus. That would be something. I probably should get a wratten violet filter and go cloud hunting.