Difference between revisions of "March 24, 2004"

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      <td width="50%"><h2 align="left">RA9</h2></td>
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  <td width="50%"><h2 align="right">March 24, 2004</h2></td>
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<IMG SRC="images/LPOD-2004-03-24.gif" NAME="main_image" width="441" height="425" border="0"></div>
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      <td><div align="center" span class="main_sm">Image Credit:  <a class="one" HREF="http://nssdc.gsfc.nasa.gov/imgcat/html/object_page/ra9_a060.html">Ranger 9 frame 060, NASA National Space Science Data Center</A></div></td>
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  <p class="story" align="center"><b>RA9 </b></p>
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  <p class="story" align="left">        Thirty-nine years ago today the Ranger 9 spacecraft crashed into the north-east floor of Alphonsus crater, having
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        successfully taken 5,814 pictures during the previous 19 minutes. Rangers 7 and [../02/LPOD-2004-02-17.htm 8]
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        had provided high resolution views of possible landing sites on mare surfaces, freeing Ranger 9 to explore a
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        geologically more interesting site. Alphonsus was a highly interesting target because its dark halo craters and
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        rilles showed that volcanism had occurred there in the past. More controversial was the observation by the
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        Russian scientist Nikolai Kozyrev who believed that he had spectroscopically detected carbon (C2) gas escaping
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        from the central peak of Alphonsus. Maybe the Moon was still volcanically active! Ranger 9 provided no answers to
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        the question of continuing volcanism, but the 10 degree sun angle resulted in dramatic images. The central peak
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        (now known not to be volcanic, but anorthosite, like the lunar highlands crust), dark halo craters (real ash
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        volcanoes) and rilles are well shown, as is the ridge made of ejecta from the Imbrium basin impact. This was the
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        first mission where pictures from space were shown live on TV.  </p>
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  <p class"story"><b>Related Links:</b><br>
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[http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1965-023A Ranger 9 Mission]</p>
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  <p class"story"> <b>Tomorrow's LPOD:</b> Russian Gores</p>
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  <p align="center" class="main_titles"><b>Author & Editor:</b><br>
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      [mailto:chuck@observingthesky.org Charles A. Wood]</p>
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      <p align="center" class="main_titles"><b>Technical Consultant:</b><br>
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      [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
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      <p align="center" class="main_titles"><b>[mailto:webmaster@entropysponge.com Contact Webmaster]</b></p>
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      <p align="center" class="main_titles"><b>A service of:</b><br>
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      <a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a></p>
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      <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
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      <a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a></p></td>
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<p>&nbsp;</p>
  
  

Revision as of 15:37, 4 January 2015

RA9

RA9

March 24, 2004
<IMG SRC="images/LPOD-2004-03-24.gif" NAME="main_image" width="441" height="425" border="0">
Image Credit: <a class="one" HREF="http://nssdc.gsfc.nasa.gov/imgcat/html/object_page/ra9_a060.html">Ranger 9 frame 060, NASA National Space Science Data Center</A>

RA9

Thirty-nine years ago today the Ranger 9 spacecraft crashed into the north-east floor of Alphonsus crater, having successfully taken 5,814 pictures during the previous 19 minutes. Rangers 7 and [../02/LPOD-2004-02-17.htm 8] had provided high resolution views of possible landing sites on mare surfaces, freeing Ranger 9 to explore a geologically more interesting site. Alphonsus was a highly interesting target because its dark halo craters and rilles showed that volcanism had occurred there in the past. More controversial was the observation by the Russian scientist Nikolai Kozyrev who believed that he had spectroscopically detected carbon (C2) gas escaping from the central peak of Alphonsus. Maybe the Moon was still volcanically active! Ranger 9 provided no answers to the question of continuing volcanism, but the 10 degree sun angle resulted in dramatic images. The central peak (now known not to be volcanic, but anorthosite, like the lunar highlands crust), dark halo craters (real ash volcanoes) and rilles are well shown, as is the ridge made of ejecta from the Imbrium basin impact. This was the first mission where pictures from space were shown live on TV.

Related Links:
Ranger 9 Mission

Tomorrow's LPOD: Russian Gores

<img src="../../../MainPage/spacer.gif" width="640" height="1">

Author & Editor:
Charles A. Wood

Technical Consultant:
Anthony Ayiomamitis

Contact Webmaster

A service of:
<a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a>

Visit these other PODs:
<a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a>


 


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