Difference between revisions of "February 18, 2004"

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      <td width="50%"><h2 align="left">Sea of Dryness</h2></td>
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  <td width="50%"><h2 align="right">February 18, 2004</h2></td>
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<table width="640"  border="0" align="center" cellpadding="6" cellspacing="2">
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      <td colspan="2"><div align="center">
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    [javascript:;" onMouseOver="MM_swapImage('main_image','','images/LPOD-2004-02-18b.jpeg',1)" onMouseOut="MM_swapImgRestore()
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<IMG SRC="images/LPOD-2004-02-18.jpeg" NAME="main_image" width="562" height="410" border="0">]</div>
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<table width="100%"  border="0" cellpadding="8">
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      <td><div align="center" span class="main_sm">Image Credit:  [mailto:gmengoli@libero.it Giorgio Mengoli]</div></td>
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  </p>
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
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  <p class="story" align="center"><b>Sea of Dryness</b></p>
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  <p class="story" align="left">The classical names for the lunar dark areas were all nautical, but all were dreadful misnomers since the Moon
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        has always lacked seas and oceans. So today, we will examine the Sea of Dryness rather than Mare Humorum, the Sea
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        of Moisture. Regional views, such as this superb image by Giorgio Mengoli, are invaluable for understanding an
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        entire structural portion of the Moon. Many of the details visible here relate to the impact basin structure of
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        the Humorum basin. The mare itself partially fills the basin depression with an estimated 3 km thickness of lava.
 +
        The rim of the basin is most clearly visible in a partial arc running from SW of
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        [../01/LPOD-2004-01-15.htm Gassendi] south towards Liebig. Basinward of this arc is a scarp, reaching
 +
        almost to Doppelmayer, that marks where the basin center dropped downward. Some of these fractures apparently
 +
        allowed gas-rich magma to reach the surface making the dark-hued pyroclastic deposit and source rille west of
 +
        Doppelmayer. The wrinkle ridges along the eastern edges of the mare mark an inner basin ring, and the famous
 +
        [../01/LPOD-2004-01-26.htm rilles] that cut Hippalus show where the  weight of the mare lavas bent and
 +
        fractured the edge terrain. And there are many more stories in this image, but we will wait for future LPODs!
 +
        Click image above to see nomenclature.  </p>
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  <p><b>Technical Details:</b><br>
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  Takahashi cassegrain Mewlon 210 - 8&quot; F/11.5 - 2415mm and HX516 ccd color 5300K.</p>
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  <p class"story"><b>Related Links:</b><br>
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  [http://digilander.libero.it/gm2/home.htm High Resolution CCD Images ]</p>
 +
 
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  <p class"story"> <b>Tomorrow's LPOD:</b> Max Goes to the Moon</p>
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  <p><img src="../../../MainPage/spacer.gif" width="640" height="1"></p>
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  </td></tr>
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      </tr>
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    <tr>
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      <td>
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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>
 +
      <p align="center" class="main_titles"><b>Technical Consultant:</b><br>
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      [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
 +
      <p align="center" class="main_titles"><b>[mailto:webmaster@entropysponge.com Contact Webmaster]</b></p>
 +
      <p align="center" class="main_titles"><b>A service of:</b><br>
 +
      <a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a></p>
 +
      <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
 +
      <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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      </tr>
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</table>
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<p>&nbsp;</p>
  
  

Revision as of 14:35, 4 January 2015

Sea of Dryness

Sea of Dryness

February 18, 2004

[javascript:;" onMouseOver="MM_swapImage('main_image',,'images/LPOD-2004-02-18b.jpeg',1)" onMouseOut="MM_swapImgRestore()

<IMG SRC="images/LPOD-2004-02-18.jpeg" NAME="main_image" width="562" height="410" border="0">]
Image Credit: Giorgio Mengoli

Sea of Dryness

The classical names for the lunar dark areas were all nautical, but all were dreadful misnomers since the Moon has always lacked seas and oceans. So today, we will examine the Sea of Dryness rather than Mare Humorum, the Sea of Moisture. Regional views, such as this superb image by Giorgio Mengoli, are invaluable for understanding an entire structural portion of the Moon. Many of the details visible here relate to the impact basin structure of the Humorum basin. The mare itself partially fills the basin depression with an estimated 3 km thickness of lava. The rim of the basin is most clearly visible in a partial arc running from SW of [../01/LPOD-2004-01-15.htm Gassendi] south towards Liebig. Basinward of this arc is a scarp, reaching almost to Doppelmayer, that marks where the basin center dropped downward. Some of these fractures apparently allowed gas-rich magma to reach the surface making the dark-hued pyroclastic deposit and source rille west of Doppelmayer. The wrinkle ridges along the eastern edges of the mare mark an inner basin ring, and the famous [../01/LPOD-2004-01-26.htm rilles] that cut Hippalus show where the weight of the mare lavas bent and fractured the edge terrain. And there are many more stories in this image, but we will wait for future LPODs! Click image above to see nomenclature.

Technical Details:
Takahashi cassegrain Mewlon 210 - 8" F/11.5 - 2415mm and HX516 ccd color 5300K.

Related Links:
High Resolution CCD Images

Tomorrow's LPOD: Max Goes to the Moon

<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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