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Author Topic: Wonderful close-ups of Rosetta's comet  (Read 26807 times)
stannn
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« on: September 09, 2014, 09:49:13 PM »

http://www.newscientist.com/article/dn26177-no-easy-parking-spot-for-firstever-comet-landing.html#.VA9mUtddXts
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« Reply #1 on: September 09, 2014, 10:03:18 PM »

I wonder what the escape velocity is? it must be quite difficult to land on a comet without bouncing off again. Maybe it has sink plungers for feet Grin

Desp
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dan_b
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« Reply #2 on: September 17, 2014, 09:25:11 AM »

I've read it definitely has some sort of anchoring mechanism to stop it bouncing away again yes. Incredible mission this one!
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M
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« Reply #3 on: September 17, 2014, 12:00:11 PM »

I've read it definitely has some sort of anchoring mechanism to stop it bouncing away again yes. Incredible mission this one!

Reading in New Scientist, the landing part (to be chucked backwards out of the main body as it goes past) will use a grappling hook. But I expect it's a very special grappling hook. [Edit: not a grapple, but a harpoon. M.]

[Further edit: "At the right moment the lander 'Philae' will be ejected backwards, allowing it to gently fall to the comet's surface, which could take as long as 12 hours. At touchdown the lander will deploy a harpoon to anchor itself." M.]

Alternatively, they could just paint a sign on it saying "I wish to purchase an extended warranty for my leccy goods", then 'Comet' will come to them, and stick like glue!

Mart.
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stannn
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« Reply #4 on: September 17, 2014, 12:31:28 PM »

http://www.newscientist.com/article/dn26212-rosetta-landing-site-chosen-for-first-comet-mission.html#.VBlwEmt5mSM
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« Reply #5 on: September 19, 2014, 02:34:04 PM »

I wish they'd hurry up and land the thing - it's going to be ages before it does so.
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stannn
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« Reply #6 on: November 03, 2014, 12:44:10 PM »

http://www.theguardian.com/science/2014/nov/01/rosetta-comet-space-mission-nears-end
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« Reply #7 on: November 11, 2014, 01:50:52 PM »

More amazing piccys

http://www.theguardian.com/science/across-the-universe/gallery/2014/nov/11/rosettas-mission-land-comet-pictures-philae


touchdown tommorow fingers crossed!

Desp
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« Reply #8 on: November 11, 2014, 04:23:31 PM »

On National Graphic apparently but not showing up in programme guide yet.

http://advanced-television.com/2014/11/11/national-geographic-to-stream-rosetta-landing/
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« Reply #9 on: November 12, 2014, 10:28:02 AM »

Via BBC.

released this morning to land this afto, results at around 4 pm. BUT they couldn't prime the booster which pins it down on the surface whilst the harpoony things are fired, so it might bounce itself back off when they fire!

Finger's crossed.....
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« Reply #10 on: November 12, 2014, 03:25:05 PM »

http://www.theguardian.com/science/across-the-universe/live/2014/nov/12/rosetta-comet-landing-live-blog

Live link to Darmstadt, mostly seems to be waffle but worth a peep maybe.

Desp
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« Reply #11 on: November 12, 2014, 04:14:48 PM »

The lander is safely attached to the comet!
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« Reply #12 on: November 12, 2014, 04:23:55 PM »

http://uk.reuters.com/article/2014/11/12/uk-space-comet-idUKKCN0IW0QD20141112
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« Reply #13 on: November 12, 2014, 05:11:06 PM »

Apparently the harpoons did not fire, but it seems to be ok. How many light minutes is it to the comet? I'm wondering how long the communications  delay is?

Wonders when they will start fracking it?

Desp

Edit, ah just heard it's 300,000,000 miles, so that's about 25- 26 light minutes or so isn't it?
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« Reply #14 on: November 12, 2014, 06:48:49 PM »

The delay is 28 minutes.   Light is a bit weak for solar panels, a bit too far from the sun. 
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