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NASA Snaps Shot of Mars-Bound Comet
coondoggie (973519) writes "NASA today released images of a comet that will make a pass within 84,000 miles of Mars — less than half the distance between Earth and the moon. NASA said the Hubble Space Telescope captured the image of comet C/2013 A1, also called Siding Spring, at a distance of 353 million miles from Earth. Hubble can't see Siding Spring's icy nucleus because of its minuscule size. The nucleus is surrounded by a glowing dust cloud that measures roughly 12,000 miles across, NASA said."
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Hubble can't see Siding Spring's icy nucleus because of its minuscule size
I don't think just because something can't be seen with one of the most powerful telescopes ever made it qualifies as miniscule.
That name, Siding Spring, comes from the name of Siding Spring Observatory, the most significant optical observatory in Australia, operated by the Australian National University. The mountain is part of the Warrumbungle Range, in the state of New South Wales, near the town Coonabarabran. It is the site of the Anglo-Australian Telescope, among others. Also see Google maps at 31.273038S 149.066804E.
Looking at space, radio, science and computing from a 'down-under' amateur enthusiast perspective.
Who applied the sharpen filter in Photoshop and called it a day?
Probably a plasma sheath, not a dust cloud.
Watch this video. The Electric Comet.
https://www.youtube.com/watch?v=34wtt2EUToo
If we are getting decent images from 353 million miles away how about when we take pictures from 84,000 miles? I mean we (the U.S.) will have 3 orbiters around Mars including MAVEN as well as two working landers. The Europeans have one or two and I think India has one on the way.
Of course the Hubble is a really good telescope but the Mars Reconnaissance Orbiter has a camera that can see meter wide objects from orbit (it can see the landers, supposedly it has the best telescope ever sent to another world) so that's not too bad (and it will be a thousand times closer!). Perhaps we can send one of the older orbiters on a "suicide" mission to get really close! (fuel providing).
On the other hand, I wonder what plans are being made to protect these assets from the "blizzard" of particles surrounding the comet? If the visible coma is 12,000 miles across even now, how large will the accompanying and expanding cloud of particles from the comet be? If it's on its outward trajectory from the sun, it might be pretty big since it will have had a lot more material being blown off of it. Will the space agencies try to arrange it so that their spacecraft are on the other side of the planet when it blows through? (If they had a lot of delta-V, I'd suggest they hide out behind one of the moons but I'm afraid that's science fiction for now). Will it go through the Mars system quickly enough to make this feasible?
I'm sure this is all being worked out by people who are much smarter (and better trained) than I so I think we can look forward to a real scientific windfall (cometfall?) in October! :) It's really going to be something!
We've flown probes through comet dust tails. We've captured particles of the dust and ice in comet tails in aerogel and returned them to Earth. We know what they are made of.
Science is all about firing a drunk pig out of a cannon just to see what happens.
Faith and creationism are great aren't they?
Hope is the currency of fools
Am I the only one who would be excited if it hit Mars? I know that it almost certainly won't, but if it did, it could possibly give us great data regarding the possible origin of water on Earth.