Rosetta: Alarm to sound for comet mission

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Re: Rosetta: Alarm to sound for comet mission

#241  Postby DougC » Apr 01, 2016 11:38 pm

Image
Comet 67P and Rosetta are now just over 400 million km from the Sun, and receding

Stunning! :clap:

B.B.C. - Comet 67P presented in silhouette
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Re: Rosetta: Alarm to sound for comet mission

#242  Postby Calilasseia » May 30, 2016 2:06 pm

From the European Space Agency Website, just in:

Ingredients regarded as crucial for the origin of life on Earth have been discovered at the comet that ESA’s Rosetta spacecraft has been probing for almost two years.

They include the amino acid glycine, which is commonly found in proteins, and phosphorus, a key component of DNA and cell membranes.

Scientists have long debated the important possibility that water and organic molecules were brought by asteroids and comets to the young Earth after it cooled following its formation, providing some of the key building blocks for the emergence of life.
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Re: Rosetta: Alarm to sound for comet mission

#243  Postby Shrunk » May 30, 2016 2:30 pm

Why does this mean that these compounds were brought to earth? Couldn't it simply demonstrate that such compounds can arise spontaneously under conditions that might have existed on pre-biotic earth?
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Re: Rosetta: Alarm to sound for comet mission

#244  Postby Calilasseia » May 31, 2016 3:39 am

Shrunk wrote:Why does this mean that these compounds were brought to earth? Couldn't it simply demonstrate that such compounds can arise spontaneously under conditions that might have existed on pre-biotic earth?


Actually, in one respect it's better than that - it demonstrates that such compounds can arise in environments that would be considered far more hostile than the surface of the prebiotic Earth.

Though of course, there's no reason why, given that we now know that such compounds can be found unambiguously on comets, those comets in the past didn't provide a supplement to any natively synthesised prebiotic Earth glycine.

I don't think anyone, let alone anyone familiar with the numerous variants of the Miller-Urey Experiment that have been run, is suggesting that prebiotic Earth synthesis never happened. We already have enough papers in the literature establishing eminently reasonable routes for this.
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Re: Rosetta: Alarm to sound for comet mission

#245  Postby DougC » Jun 30, 2016 12:15 pm

http://www.bbc.co.uk/news/science-environment-36607608

B.B.C. Article
Rosetta comet probe given termination date
The Rosetta probe will be crash-landed on Comet 67P on Friday 30 September, the European Space Agency has confirmed.
The manoeuvre, which is expected to destroy the satellite, will bring to an end two years of investigations at the 4km-wide icy dirt-ball.
Flight controllers plan to have the cameras taking and relaying pictures during the final descent.
Sensors that "sniff" the chemical environment will also be switched on.
All other instruments will likely be off.
Flight dynamics experts have still to work out the fine details, but Rosetta will be put into a tight ellipse around the comet and commanded to drop its periapsis (lowest pass) progressively. A final burn will then put the satellite on a collision course with the duck-shaped object.
Mission managers have previously talked about bringing Rosetta down in a place dubbed "Agilkia" - the location originally chosen to land its surface robot, Philae, in November 2014.

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Re: Rosetta: Alarm to sound for comet mission

#246  Postby DougC » Jul 28, 2016 11:12 pm

B.B.C. - Farewell to Philae as lander comms cut
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Re: Rosetta: Alarm to sound for comet mission

#247  Postby newolder » Sep 05, 2016 2:45 pm

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Re: Rosetta: Alarm to sound for comet mission

#248  Postby DougC » Sep 05, 2016 11:31 pm

Typical, you hunt and hunt, give up, switch off comms, then you find the little sod.
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Re: Rosetta: Alarm to sound for comet mission

#249  Postby newolder » Sep 06, 2016 9:20 am

It looks like it's had a terrible day at Robot Wars or Battlebots! Pity there's no pit crew to fix things up for the later rounds. At least the received telemetry will make more sense now that the orientation is known. :thumbup: Rest in peace, tiny bot.

ETA
ESA release
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Re: Rosetta: Alarm to sound for comet mission

#250  Postby newolder » Sep 19, 2016 12:05 pm

ESA hangout on readiness for Rosetta to descend to the comet, now:
https://www.youtube.com/watch?v=x9lIPUjFe40

10-ish days to go till touchdown... Replay available, if you missed it...
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Re: Rosetta: Alarm to sound for comet mission

#251  Postby newolder » Sep 22, 2016 1:58 pm

Rosetta's final fling:
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Re: Rosetta: Alarm to sound for comet mission

#252  Postby newolder » Sep 29, 2016 9:23 am

With comet impact fast approaching:
SCIENCE ‘TIL THE VERY END

Rosetta will collect science data until the very end of its descent on Friday. The opportunity to study a comet at such close proximity makes the descent phase one of the most exciting of the entire mission.

A summary of the goals of the instruments that are operating during the descent are provided below:

More @ Rosetta blog
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Re: Rosetta: Alarm to sound for comet mission

#253  Postby newolder » Sep 29, 2016 12:03 pm

Grand Finale starts in 1/2 hour... :dunno:
http://rosetta.esa.int

Order of proceedings:
Image
Starting 15 mins late...

ETA 15 minute delay due to "Late arriving media at ESCO security." :dunno:
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Re: Rosetta: Alarm to sound for comet mission

#254  Postby newolder » Sep 29, 2016 12:58 pm

Sound works on this stream: http://livestream.com/accounts/362/rosettagrandfinale

Thinking of sound - "The singing comet" update can be found here: https://soundcloud.com/tagirijus/a-comets-life

All in all an excellent summary of Rosetta's 2 year mission. The final hours tomorrow will bring the final megabytes of data and some superb pictures before the cameras lose focus within the final kilometre of descent. Well done ESA and the teams. :cheers:
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Re: Rosetta: Alarm to sound for comet mission

#255  Postby newolder » Sep 30, 2016 10:23 am

Next event: Rosetta touchdown. Coverage begins. :popcorn:
http://livestream.com/ESA/rosettagrandfinale

Blue dot at lower right is destination:
Image

Should be there already, confirmation in next 25 minutes or so...
We love that @ESA_Rosetta is taking pictures of a pit ... we love pits!


13:20:21 BST The end.
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Re: Rosetta: Alarm to sound for comet mission

#256  Postby tuco » Oct 01, 2016 11:38 am

To paraphrase the mission manager, impressive scientific and technological feat indeed. tx gj bai
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Re: Rosetta: Alarm to sound for comet mission

#257  Postby newolder » Apr 24, 2018 7:55 am

There's a 20-odd frame stacked image gif purportedly of Philae data doing the rounds at the moment that is quite extraordinary... The scene comprises background stars, cosmic rays and local dust to make what looks like a snow storm near the cliffs on the comet before the lander crash landed...
An mp4 video can be found here: https://video.twimg.com/tweet_video/DbfSuvHXkAUCKFW.mp4
2 twitter links(though there are many others): https://twitter.com/Yodatheoak/status/9 ... 0439940096 and https://twitter.com/landru79/status/988490703075463168 for the gif
And an ESA link here: https://imagearchives.esac.esa.int/pict ... tegory/410

:shock:
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Re: Rosetta: Alarm to sound for comet mission

#258  Postby newolder » Apr 26, 2018 7:19 am

Gif now available widely since it's also featured in today's (April 26th) apod. :cool:
Image
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Re: Rosetta: Alarm to sound for comet mission

#259  Postby CdesignProponentsist » Apr 26, 2018 8:16 pm

That gif is worth the entire mission for me. Amazing.
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Re: Rosetta: Alarm to sound for comet mission

#260  Postby Rumraket » Apr 26, 2018 8:41 pm

Mind = blown.
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