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Astronomy Picture of the Day
NASA ^ | 6/24/08 | NASA

Posted on 06/24/2008 2:27:26 PM PDT by sig226


Ithaca Chasma: The Great Rift on Saturn's Tethys
Credit:
Cassini Imaging Team, SSI, JPL, ESA, NASA

Explanation: What created the Great Rift on Saturn's moon Tethys? No one is sure. More formally named Ithaca Chasma, the long canyon running across the right of the above image extends about 2,000 kilometers long and spreads as much as 100 kilometers wide. The above image was captured by the Saturn-orbiting robotic Cassini spacecraft as it zoomed by the icy moon last month. Hypotheses for the formation of Ithaca Chasma include cracking of Tethy's outer crust as the moon cooled long ago, and that somehow the rift is related to the huge Great Basin impact crater named Odysseus, visible elsewhere on the unusual moon. Cassini has now been orbiting Saturn for about four years and is scheduled to continue to probe and photograph Saturn for at least two more years.


TOPICS: Astronomy Picture of the Day
KEYWORDS: apod
I'm curious why they chose this image for the apod. The Mariana Trench is over 2,500 kilometers long and about 70 kilomters wide, and it is not the only one on Earth. Scientifically speaking, Tethys was hot. It cooled. Now it looks funny.

I was hoping for greater revaletions than this.

1 posted on 06/24/2008 2:27:26 PM PDT by sig226
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To: fnord; Number57; KevinDavis; rdb3; MNJohnnie; thoughtomator; RightWhale; proudofthesouth; ...

2 posted on 06/24/2008 2:27:49 PM PDT by sig226 (Real power is not the ability to destroy an enemy. It is the willingness to do it.)
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To: sig226

Ithaca is gorgeous.


3 posted on 06/24/2008 2:36:49 PM PDT by Steely Tom (Without the second, the rest are just politicians' BS.)
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Comment #4 Removed by Moderator

To: sig226

Mariana Trench is relatively small compared to geography of other planets and moons like Tethys.

Valles Marineris on Mars is over 4000 kilometers long and up to 4 miles deep, with mountain elevations reaching over 16 miles high.


5 posted on 06/24/2008 4:37:36 PM PDT by dragnet2
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To: ThoseDamnLiberals
I didn’t realize “you people” believed in the moon. After all, space isn’t exactly mentioned in the bible.

Spacecraft weren't mentioned either, but they now exist and bring us images never seen from earth.

6 posted on 06/24/2008 4:42:47 PM PDT by dragnet2
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To: sig226

Yea, I’d say it has something to do with that GIANT crater on the bottom of the picture.


7 posted on 06/24/2008 5:58:58 PM PDT by mowowie
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To: ThoseDamnLiberals

What is that supposed to mean?


8 posted on 06/24/2008 7:40:40 PM PDT by sig226 (Real power is not the ability to destroy an enemy. It is the willingness to do it.)
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Comment #9 Removed by Moderator

To: ThoseDamnLiberals

I’m surprised your username was available today.


10 posted on 06/24/2008 7:56:55 PM PDT by j_tull (Massachusetts, the Gay State. Once leader of the American Revolution, now leading its demise.)
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