Difference between revisions of "February 29, 2004"

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=Marvelous Marius Rille=
 
=Marvelous Marius Rille=
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<table width="640"  border="0" align="center" cellpadding="6" cellspacing="2">
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      <td width="50%"><h2 align="left">Marvelous Marius Rille</h2></td>
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  <td width="50%"><h2 align="right">February 29, 2004</h2></td>
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<table width="640"  border="0" align="center" cellpadding="6" cellspacing="2">
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    [javascript:;" onMouseOver="MM_swapImage('main_image','','images/LPOD-2004-02-29b.jpeg',1)" onMouseOut="MM_swapImgRestore() <IMG SRC="images/LPOD-2004-02-29.jpeg" NAME="main_image" width="579" height="425" 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:legault@club-internet.fr Thierry Legault]</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>Marvelous Marius Rille </b></p>
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  <p class="story" align="left">
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          Sinuous rilles have led some lunar scientists astray. The curving outlines led to proposals that such rilles were
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        meandering water streams, although by shape alone a giant worm might have been equally defensible! But the Moon's
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        lack of water and life eliminate those origins. Sinuous rilles do resemble - and probably are - lava channels,
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        made by lava flowing downhill from a source vent. The Apollo 15 visit to the
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        [LPOD-2004-02-26.htm Hadley Rille] supported that interpretation. So it is not surprising to find
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        the wonderful Marius Rille at the north end of the volcanic Marius Hills complex. What is surprising is that such
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        an excellent image of the rille was taken with a 12" telescope! Legault's image shows the 2 km wide rille starting
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        northwest of the crater Marius C without any obvious vent and running about 250 km (according to Rukl's <I>Atlas
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        of the Moon</I>). It takes a turn to the left near Marius B, and at Marius P narrows to about 1 km width.
 +
        Look northeast of Marius P to see a much thinner rille that is barely visible on Lunar Orbiter IV images. This
 +
        image also reveals a central peak in the 11.4 km wide Marius C and some sort of off-center hill in Marius B (11.6
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        km). Only a few impact craters this size have central peaks - the transition to complex craters begins in craters
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        with diameters of about 15 km. <I>Move the mouse over the image to see crater designations.</I>
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</p>
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  <p><b>Technical Details:</b><br>
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  305 mm Meade Schmidt-Cassegrain and Philips Vesta Pro webcam </p>
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  <p class"story"><b>Related Links:</b><br>
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[http://perso.club-internet.fr/legault/ High resolution CCD imaging]<br>
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[http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_150_h2.jpg Lunar Orbiter IV view]<br>
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[http://www.marsinstitute.info/rd/faculty/dportree/rtr/ap33.html Water Exploration in the Marius Hills]</p>
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  <p class"story"> <b>Tomorrow's LPOD:</b> Old Moon's Arms</p>
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  <p><img src="../../../MainPage/spacer.gif" width="640" height="1"></p>
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      <td><hr width="640"></td>
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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>
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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>
 +
      <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 15:36, 4 January 2015

Marvelous Marius Rille

Marvelous Marius Rille

February 29, 2004
[javascript:;" onMouseOver="MM_swapImage('main_image',,'images/LPOD-2004-02-29b.jpeg',1)" onMouseOut="MM_swapImgRestore() <IMG SRC="images/LPOD-2004-02-29.jpeg" NAME="main_image" width="579" height="425" border="0">]
Image Credit: Thierry Legault

Marvelous Marius Rille

Sinuous rilles have led some lunar scientists astray. The curving outlines led to proposals that such rilles were meandering water streams, although by shape alone a giant worm might have been equally defensible! But the Moon's lack of water and life eliminate those origins. Sinuous rilles do resemble - and probably are - lava channels, made by lava flowing downhill from a source vent. The Apollo 15 visit to the [LPOD-2004-02-26.htm Hadley Rille] supported that interpretation. So it is not surprising to find the wonderful Marius Rille at the north end of the volcanic Marius Hills complex. What is surprising is that such an excellent image of the rille was taken with a 12" telescope! Legault's image shows the 2 km wide rille starting northwest of the crater Marius C without any obvious vent and running about 250 km (according to Rukl's Atlas of the Moon). It takes a turn to the left near Marius B, and at Marius P narrows to about 1 km width. Look northeast of Marius P to see a much thinner rille that is barely visible on Lunar Orbiter IV images. This image also reveals a central peak in the 11.4 km wide Marius C and some sort of off-center hill in Marius B (11.6 km). Only a few impact craters this size have central peaks - the transition to complex craters begins in craters with diameters of about 15 km. Move the mouse over the image to see crater designations.

Technical Details:
305 mm Meade Schmidt-Cassegrain and Philips Vesta Pro webcam

Related Links:
High resolution CCD imaging
Lunar Orbiter IV view
Water Exploration in the Marius Hills

Tomorrow's LPOD: Old Moon's Arms

<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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