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Astronomy Picture of the Day
NASA ^ | 7/26/10 | NASA, ESA

Posted on 07/26/2010 5:43:35 AM PDT by sig226


Lutetia: The Largest Asteroid Yet Visited
Credit:
ESA, NASA, JAXA; Montage: Emily Lakdawalla (Planetary Society)

Explanation: As humans explore the universe, the record for largest asteroid visited by a spacecraft has increased yet again. Earlier this month, ESA's robotic Rosetta spacecraft zipped past the asteroid 21 Lutetia taking data and snapping images in an effort to better determine the history of the asteroid and the origin of its unusual colors. Although of unknown composition, Lutetia is not massive enough for gravity to pull it into a sphere. Pictured above on the upper right, the 100-kilometer across Lutetia is shown in comparison with the other nine asteroids and four comets that have been visited, so far, by human-launched spacecraft. Orbiting in the main asteroid belt, Lutetia shows itself to be a heavily cratered remnant of the early Solar System. The Rosetta spacecraft is now continuing onto comet Churyumov-Gerasimenko where a landing is planned for 2014.


TOPICS: Astronomy Picture of the Day
KEYWORDS: apod

1 posted on 07/26/2010 5:43:38 AM PDT by sig226
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To: null and void; fnord; Number57; KevinDavis; rdb3; MNJohnnie; RightWhale; proudofthesouth; ...

2 posted on 07/26/2010 5:44:49 AM PDT by sig226 (Bring back Jimmy Carter!!!)
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To: sig226

Interesting, 21 Lutetia appears to have faint striations like those on Phobos.


3 posted on 07/26/2010 5:47:24 AM PDT by cripplecreek (Remember the River Raisin! (look it up))
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To: sig226

Brother, looks like my “kids” when I’m constipated.


4 posted on 07/26/2010 6:05:12 AM PDT by fieldmarshaldj (~"This is what happens when you find a stranger in the Amber Lamps !"~~)
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To: cripplecreek

Literal floating gold mines!


5 posted on 07/26/2010 7:32:24 AM PDT by Dimez Vagrant
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To: Dimez Vagrant

Very likely.


6 posted on 07/26/2010 7:34:14 AM PDT by cripplecreek (Remember the River Raisin! (look it up))
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