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Spacecraft Rosetta and Philae

Comments on Spacecraft Rosetta and Philae

Nihil Loc
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Posted 04/16/14 - 1:35 PM:
Subject: Spacecraft Rosetta and Philae
The spacecraft, Rosetta, which was launched 10 years ago (2004) is about to meet up with its primary mission target, the comet named "67/P Churyumov-Gerasimenko". The craft contains a module which will (try to) softly land on the comet's surface and analyze surface and subsurface materials.

This is the first human attempt to land a probe on a comet.

Rosetta's Philae Lander Snaps a Selfie

Wikipedia: Rosetta (spacecraft)

Rosetta Blog

Here is a good visual of how Rosetta arrived at its target, by using the gravity and direction of planets (ie. Earth and Mars) to increase its momentum and change its orbit.

Do you wager this landing will be a success?

Edited by Nihil Loc on 04/16/14 - 1:45 PM
thedoc
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Posted 04/16/14 - 3:44 PM:

It would be nice if PBS and Nova did a special on this some time in the future. Many years ago they did a show "Neptune all Night" and I stayed up all night on the couch watching and taping it. I even watched it again later, now it's on YouTube if you want to look it up. Later PBS broadcast several specials about the Neptune encounter, unfortunately those tapes are now gone.
Nihil Loc
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Posted 04/17/14 - 1:33 PM:

So "Neptune all Night" was about Voyager 2's flyby of Neptune in 1989.

The Voyager probes are still active apparently but the signals are exceedingly weak due to the distance (104+ AU away). Strange to think that it will take something like tens of thousands of years for it to get half the distance to our closest star. The distances out there are mind numbing.

thedoc
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Posted 04/17/14 - 2:27 PM:

Yes, and one of the interesting speculations was about the 'Ring Plane Crossing'. Would Voyager hit something and be destroyed, also at one point there was the static from dust particles hitting the spacecraft and creating 'radio noise'.
thedoc
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Posted 04/17/14 - 2:32 PM:

Another thing that I now remember is that the photos shown on the TV show were 1/4 of the resolution of the real photos. They would show every other pixel in every other row, cutting the density of pixels to 25% of what was to be sent back, and the actual pictures were to be sent back later. at the time of the fly-by the photo data was stored in memory and then transmitted back to earth later.
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