Mercury's Horizon from MESSENGER


	Mercury's Horizon from MESSENGER

tabsey

1-23-2008 6:57 AM

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tags:

space

tabsey says:

No trees.

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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://www.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/f0dfffdb-3c83-4bd0-a1e5-9e5089b84441/A74CC918-16A9-4C2C-91B0-89A452DE5589/" 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://antwrp.gsfc.nasa.gov/apod/ap080121.html" href="http://antwrp.gsfc.nasa.gov/apod/ap080121.html" style="font-size: 11px;">antwrp.gsfc.nasa.gov</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/ap080121.html"><P>
2008 January 21
<A href="http://antwrp.gsfc.nasa.gov/apod/image/0801/mercury03_messenger_big.png">
<IMG alt="See Explanation.  Clicking on the picture will download
 the highest resolution version available." src="http://antwrp.gsfc.nasa.gov/apod/image/0801/mercury03_messenger.jpg" /></A>
</P></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://antwrp.gsfc.nasa.gov/apod/ap080121.html"><P>
<B> Explanation: </B>
What would it look like to fly past Mercury?  
Just such an adventure was experienced last week by the MESSENGER spacecraft during its 
<A href="http://messenger.jhuapl.edu/the_mission/mercury_rendezvous.html">first flyby</A> of the strange 
<A href="http://antwrp.gsfc.nasa.gov/apod/ap030312.html">moon</A>-like world nearest the Sun.  
<A href="http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?page=1&gallery_id=2&image_id=122">Pictured above</A> is the limb of 
<A href="http://en.wikipedia.org/wiki/Mercury_%28planet%29">Mercury</A> 
seen by <A href="http://en.wikipedia.org/wiki/MESSENGER">MESSENGER</A> 
upon approach, from about 1 1/2 
<A href="http://antwrp.gsfc.nasa.gov/apod/ap070514.html">Earth</A> diameters away.  
Visible on the hot and barren planet are many 
<A href="http://liftoff.msfc.nasa.gov/academy/space/solarsystem/meteors/Craters.html">craters</A>, many appeared to be more shallow than similarly sized craters on the Moon.  
The comparatively high 
<A href="http://www.exploratorium.edu/ronh/weight/">gravity</A> of 
Mercury helps 
<A href="http://www.planetary.org/blog/article/00001301/">flatten</A> 
tall structures like high crater walls.  
<A href="http://messenger.jhuapl.edu/why_mercury/index.html">MESSENGER</A> 
was able to take over 1,000 images of Mercury which will be beamed back to 
Earth for 
<A href="http://en.wikipedia.org/wiki/Planetary_geology">planetary geologists</A> 
to study.  
The robotic MESSENGER spacecraft is 
<A href="http://www.nasa.gov/mission_pages/messenger/timeline/index.html">scheduled</A> to fly past Mercury twice more before firing its thrusters 
to enter orbit in 2011.  
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