Rosetta: Alarm to sound for comet mission

Discuss celestial objects and phenomena outside the Earth's atmosphere, Earth-launched satellites and exploratory missions, etc....

Moderators: Calilasseia, ADParker

Re: Rosetta: Alarm to sound for comet mission

#181  Postby Onyx8 » Nov 20, 2014 5:20 pm

Cool.
The problem with fantasies is you can't really insist that everyone else believes in yours, the other problem with fantasies is that most believers of fantasies eventually get around to doing exactly that.
User avatar
Onyx8
Moderator
 
Posts: 17520
Age: 64
Male

Canada (ca)
Print view this post

Ads by Google


Re: Rosetta: Alarm to sound for comet mission

#182  Postby Rumraket » Dec 04, 2014 9:07 am

The official webpage of the lander experiment is annoying and confusing. Anyone heard any news about the chemical experiments conducted on the surface?

EDIT: Bah - nvm. It will take months before we get the results: http://blogs.esa.int/rosetta/2014/12/02/the-quest-for-organic-molecules-on-the-surface-of-67pc-g/
Half-Life 3 - I want to believe
User avatar
Rumraket
 
Posts: 13215
Age: 40

Print view this post

Re: Rosetta: Alarm to sound for comet mission

#183  Postby DougC » Dec 10, 2014 8:15 pm

http://www.bbc.co.uk/news/science-environment-30414519
B.B.C. Article
Rosetta results: Comets 'did not bring water to Earth'
Scientists have dealt a blow to the theory that most water on Earth came from comets.
Results from the Rosetta mission, which made history by landing on comet 67P in November, shows the water on the icy mass is unlike that on our planet.
The results are published in the journal Science.
The authors conclude it is more likely that the water came from asteroids, but other scientists say more data is needed before comets can be ruled out.
Since August, the Rosetta probe has been orbiting Comet 67P/Churyumov-Gerasimenko, and on 12 November its lander, Philae, made a historic touchdown on the object's surface.
Although the robot's batteries ran out soon after setting down, it gathered a wealth of scientific data, and the Rosetta "mothership" continues to analyse the wandering "ice mountain".
This unprecedented, close-up look at a comet is helping scientists to answer the fundamental question of whether a bombardment of these primitive bodies brought water to Earth billions of years ago.
And the latest findings, gathered by Rosetta's Rosina instrument, which consists of two mass spectrometers that "sniff" the gas that streams off the surface of 67P, suggests this may not be the case.

(Continues)
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#184  Postby DougC » Dec 13, 2014 12:49 am

B.B.C. - Even in colour, Comet 67P is grey
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#185  Postby DougC » Dec 13, 2014 12:51 am

B.B.C. - Philae comet lander: Sleep well little probe
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#186  Postby Evolving » Dec 13, 2014 8:36 am

DougC wrote:http://www.bbc.co.uk/news/science-environment-30414519
B.B.C. Article
Rosetta results: Comets 'did not bring water to Earth'
Scientists have dealt a blow to the theory that most water on Earth came from comets.


Hmm. Drat.

Now I'm intrigued!
How extremely stupid not to have thought of that - T.H. Huxley
User avatar
Evolving
 
Name: Serafina Pekkala
Posts: 11993
Female

Country: Luxembourg
Luxembourg (lu)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#187  Postby lpetrich » Dec 13, 2014 11:09 am

Rosetta fuels debate on origin of Earth’s oceans / Rosetta / Space Science / Our Activities / ESA

Comet 67P has about 3 times as much deuterium (H-2) as the Earth does, and other comets are also enriched, typically by a factor of 2 or 3. Asteroids, however, have amounts of deuterium close to the Earth's, though some of them are enriched up to a factor of 2. Uranus and Neptune, however, have only 1/3 as much, and the Sun, Jupiter, and Saturn only 1/9 as much.

What likely did it: fractional evaporation and fractional condensation. Light isotopes evaporate more easily than heavy ones, and heavy ones condense more easily than light ones. One can measure this difference. At 1 atm pressure, ordinary water boils at 100 C, while heavy water boils at 101.4 C. Heavy water is (H-2)2O as opposed to ordinary water, which is mostly (H-1)2O.

The less massive objects could not accrete hydrogen gas, so they most likely got their hydrogen in water, and that required condensing out of the protoplanetary nebula. That may explain the increased concentration of deuterium: heavy water condensing out more easily than light water.

A good check may be provided by isotopes of oxygen, since they also may be fractionated.
lpetrich
 
Posts: 750
Age: 60
Male

United States (us)
Print view this post

Ads by Google


Re: Rosetta: Alarm to sound for comet mission

#188  Postby Pulsar » Dec 17, 2014 12:06 pm

Some new images

Image

Image

Image

Image
"The longer I live the more I see that I am never wrong about anything, and that all the pains that I have so humbly taken to verify my notions have only wasted my time." - George Bernard Shaw
User avatar
Pulsar
 
Posts: 4618
Age: 43
Male

Country: Belgium
Belgium (be)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#189  Postby kennyc » Dec 17, 2014 9:32 pm

Lots going on at the annual American Geophysical Union meeting this week, including talk of Philae, Rosetta and the comet.

European Comet Lander May Wake Up from Space Slumber

Philae, part of the European Space Agency's Rosetta mission, went into hibernation in mid-November, a few days after executing a dramatic and historic touchdown on the surface of Comet 67P/Churyumov-Gerasimenko — the first-ever soft landing on one of these icy relics from the solar system's formation.

The highly anticipated maneuver didn't go entirely as planned. Philae's anchoring harpoons failed to fire, and the robot bounced twice before finally settling down on Comet 67P/C-G in the shadow of an ice cliff. Philae was cut off from sunlight for much of the day, so the solar-powered lander went into hibernation when its primary batteries ran out, shortly after wrapping up its initial round of science observations on the comet's surface. [See comet photos from Rosetta and Philae]

But it's now approaching summer in Philae's presumed location, so the washing-machine-size lander could soon access enough energy to open its eyes and start working again, mission scientists said.
....

http://www.space.com/28041-rosetta-come ... akeup.html
Kenny A. Chaffin
Art Gallery - Photo Gallery - Writing&Poetry
"Strive on with Awareness" - Siddhartha Gautama
User avatar
kennyc
 
Name: Kenny A. Chaffin
Posts: 8698
Male

Country: U.S.A.
United States (us)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#190  Postby DougC » Dec 17, 2014 10:45 pm

B.B.C. - Philae comet landing 'all a blur'
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#191  Postby Made of Stars » Dec 18, 2014 10:44 am

Work to find the Philae lander is ongoing, as reported at the American Geophysical Union meeting: http://www.universetoday.com/117443/new ... et-emerge/

Image
Made of Stars, by Neil deGrasse Tyson and zenpencils

“Be humble for you are made of earth. Be noble for you are made of stars” - Serbian proverb
User avatar
Made of Stars
RS Donator
 
Name: Call me Coco
Posts: 9820
Age: 52
Male

Country: Girt by sea
Australia (au)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#192  Postby Made of Stars » Jan 02, 2015 12:31 pm

Nice composite pic showing Philae lander's trip across the face of comet:

Image
Made of Stars, by Neil deGrasse Tyson and zenpencils

“Be humble for you are made of earth. Be noble for you are made of stars” - Serbian proverb
User avatar
Made of Stars
RS Donator
 
Name: Call me Coco
Posts: 9820
Age: 52
Male

Country: Girt by sea
Australia (au)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#193  Postby DougC » Jan 06, 2015 2:23 am

B.B.C. - Philae comet lander eludes discovery
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#194  Postby DougC » Jan 17, 2015 3:12 am

B.B.C. - Rosetta will prompt science images rethink

Image
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#195  Postby DougC » Jan 23, 2015 12:38 am

B.B.C. - 'Goosebumps' on 'space duck' hint at comet formation
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Ads by Google


Re: Rosetta: Alarm to sound for comet mission

#196  Postby Made of Stars » Jan 23, 2015 12:46 pm

Great article, thanks. :thumbup:

A high-res pic:

Image
Made of Stars, by Neil deGrasse Tyson and zenpencils

“Be humble for you are made of earth. Be noble for you are made of stars” - Serbian proverb
User avatar
Made of Stars
RS Donator
 
Name: Call me Coco
Posts: 9820
Age: 52
Male

Country: Girt by sea
Australia (au)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#197  Postby Made of Stars » Jan 25, 2015 6:46 pm

Excellent digest of recently published research:

http://www.universetoday.com/118444/lat ... ore-118444

Image

Credit: ESA
Made of Stars, by Neil deGrasse Tyson and zenpencils

“Be humble for you are made of earth. Be noble for you are made of stars” - Serbian proverb
User avatar
Made of Stars
RS Donator
 
Name: Call me Coco
Posts: 9820
Age: 52
Male

Country: Girt by sea
Australia (au)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#198  Postby DougC » Jan 30, 2015 7:32 pm

B.B.C. - Controllers now banking on Philae wake-up call

EDIT

Image
Where is the Abydos site? All the indications are that Philae should be found somewhere in a strip of terrain roughly 350m by 30m
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#199  Postby Made of Stars » Feb 14, 2015 11:21 am

Rosetta is manoeuvring for a close-up (6km altitude) run, and is presently 50km out. The current altitude makes for some impressive views of the jets now active as the comet approaches Sol:

Image

More: http://www.planetary.org/blogs/emily-la ... tance.html
Made of Stars, by Neil deGrasse Tyson and zenpencils

“Be humble for you are made of earth. Be noble for you are made of stars” - Serbian proverb
User avatar
Made of Stars
RS Donator
 
Name: Call me Coco
Posts: 9820
Age: 52
Male

Country: Girt by sea
Australia (au)
Print view this post

Re: Rosetta: Alarm to sound for comet mission

#200  Postby DougC » Mar 05, 2015 6:52 pm

B.B.C. - Rosetta catches its own shadow

Image
To do, is to be (Socrate)
To be, is to do (Sartre)
Do be do be do (Sinatra)
SUBWAY(1985)
DougC
THREAD STARTER
 
Posts: 14578
Age: 48
Male

Country: UNITED Kingdom
United Kingdom (uk)
Print view this post

PreviousNext

Return to Astronomy & Space Science

Who is online

Users viewing this topic: No registered users and 1 guest