Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day -- Descent to a Comet
NASA ^ | November 13, 2014 | (see photo credit)

Posted on 11/13/2014 2:43:12 PM PST by SunkenCiv

click here to read article


Navigation: use the links below to view more comments.
first previous 1-2021-25 last
To: Zuben Elgenubi
I’m betting it’s made up primarily of rock and ice. lol

I'm betting that like every other comet we've visited or flown by, there will be NO ICE, just rock.

21 posted on 11/13/2014 7:15:14 PM PST by Swordmaker (This tag line is a Microsoft insult free zone... but if the insults to Mac users continue...)
[ Post Reply | Private Reply | To 4 | View Replies]

To: dr_lew
The harpoon was a sort of skyhook, wasn’t it? I don’t know why they didn’t have a thruster. It wouldn’t have required much - just some compressed gas, maybe. Tried and true.

The had a nitrogen thruster to push the lander against the comet so the landing pad "ice screws" could "drill in" to hold the lander down, after the "harpoon" dug its way into the "icy surface of the comet." That all failed. Oops. The thruster failed to operate. The lander did not stay on the surface so the leg screws could attach, instead the lander "bounced" one kilometer into space before coming down and "landing" without another bounce (how was that accomplished? Or was it really a "non-destructive crash landing?"), apparently, they say on its side, in the shade of a cliff where it will only get a portion of the sunlight it needs to keep the battery charged, a kilometer away from the carefully selected landing site, with no way to try again.

22 posted on 11/13/2014 7:24:20 PM PST by Swordmaker (This tag line is a Microsoft insult free zone... but if the insults to Mac users continue...)
[ Post Reply | Private Reply | To 20 | View Replies]

To: SunkenCiv

Whitey still on the Moon!


23 posted on 11/13/2014 7:28:08 PM PST by Rome2000 (SMASH THE CPUSA)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rome2000

;’)


24 posted on 11/13/2014 7:56:43 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/_______________________Celebrate the Polls, Ignore the Trolls)
[ Post Reply | Private Reply | To 23 | View Replies]

To: Zuben Elgenubi

http://en.wikipedia.org/wiki/Giotto_(spacecraft)

Measured volume of material ejected by Halley:
80% water,
10% carbon monoxide
2.5% A mix of methane and ammonia.
Other hydrocarbons, iron, and sodium were detected in trace amounts.


25 posted on 11/13/2014 8:01:28 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/_______________________Celebrate the Polls, Ignore the Trolls)
[ Post Reply | Private Reply | To 4 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-25 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson