Stickney Crater | Clipmarks


	Stickney Crater

amgumen

4-13-2008 8:13 PM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/a6cb20ae-984b-4658-80cc-ea14b5063e47/3749F4DE-AABD-493D-951E-5000EC730671/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://apod.nasa.gov/apod/ap080410.html" href="http://apod.nasa.gov/apod/ap080410.html" style="font-size: 11px;">apod.nasa.gov</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://apod.nasa.gov/apod/ap080410.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/apod.nasa.gov/img/E78083A4-A711-4C42-A93D-605EF5345F18" alt="See Explanation.  Clicking on the picture will download
 the highest resolution version available." /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://apod.nasa.gov/apod/ap080410.html"><B> Explanation: </B>
Stickney Crater, the largest crater on the martian moon Phobos,
is named for
<A href="http://maia.usno.navy.mil/women_history/hall.html">Chloe
Angeline Stickney</A> Hall,
mathematician and wife of astronomer Asaph Hall.
Asaph Hall discovered both the
<A href="http://apod.nasa.gov/apod/ap031024.html">Red Planet's moons</A> in 1877.
Over 9 kilometers across, Stickney is nearly half the
<A href="http://www.planetary.org/blog/article/00001348">diameter
of Phobos itself</A>, so large that the
impact that blasted out the crater likely came close
to shattering the tiny moon.
This <A href="http://hirise.lpl.arizona.edu/phobos.php">stunning,
enhanced-color image</A> of Stickney and surroundings
was recorded by the HiRISE camera onboard the
Mars Reconnaissance Orbiter as it passed within some
six thousand kilometers
<A href="http://apod.nasa.gov/apod/ap031129.html">of Phobos</A> last month.
Even though the surface gravity of
<A href="http://www.nineplanets.org/phobos.html">asteroid-like Phobos</A>
is less than 1/1000th Earth's gravity, streaks suggest loose
material has slid down inside the crater walls over time.
Light bluish regions near the crater's rim could indicate
a relatively freshly exposed surface.
The origin of the
<A href="http://apod.nasa.gov/apod/ap041120.html">curious grooves</A> along the surface is
mysterious</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/3749F4DE-AABD-493D-951E-5000EC730671/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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