Difference between revisions of "January 30, 2004"
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| + | </p> | ||
| + | <table width="85%" border="0" align="center" cellpadding="6" cellspacing="2"> | ||
| + | <tr> | ||
| + | <td width="50%"><h2 align="left">Lake of Death</h2></td> | ||
| + | <td width="50%"><h2 align="right">January 30, 2004</h2></td> | ||
| + | </tr> | ||
| + | </table> | ||
| + | <table width="85%" border="0" align="center" cellpadding="6" cellspacing="2"> | ||
| + | <tr> | ||
| + | <td colspan="2"><div align="center"> | ||
| + | <IMG SRC="images/LPOD-2004-01-30.jpeg" NAME="main_image" width="498" height="400" border="0"></div></td> | ||
| + | </tr> | ||
| + | </table> | ||
| + | <table width="100%" border="0" cellpadding="8"> | ||
| + | <tr> | ||
| + | <td><div align="center" span class="main_sm">Image Credit: <A class="one" HREF="mailto:kcpaulhk@yahoo.com.hk">K.C. Pau</A></div></td> | ||
| + | </tr> | ||
| + | </table> | ||
| + | </p> | ||
| + | <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | ||
| + | <p class="story" align="center"><b>Lake of Death</b></p> | ||
| + | <p class="story" align="left">Do you consider Lacus Mortis - The Lake of Death - a crater? Because of the mare-like term "lacus" some observers just | ||
| + | see it as a patch of mare material linking Mare Frigoris and Lacus Somniorum. But if you linger, taking your eyes off the | ||
| + | challenging rilles and superposed crater Burg, you will easily notice low walls that enclose nearly the entire lake. I | ||
| + | say "walls" rather than "rim" for the latter term implies a rampart that projects above the surrounding environs, and | ||
| + | these don't. Lacus Mortis is a depression lower than most of its surroundings, especially the rubbly plateau to the west. | ||
| + | Notice the faint diagonal lineations in the rubbly material? They are probably flow marks in this jumble of ejecta from | ||
| + | the Imbrium basin. Notice also that the walls of Lacus Mortis do not define a circle or an ellipse - they have distinct | ||
| + | straight edges. These linear wall segments are part of the lunar grid system, marked also by the polygonal sides of | ||
| + | Ptolemaeus, the [LPOD-2004-01-11.htm Straight Wall], the Alpine Valley and other straight features. Some | ||
| + | of these linear features are related to basins, but others could have formed by tidal stressing early in lunar history | ||
| + | when the Moon was much closer to Earth. | ||
| + | |||
| + | <p><b>Technical Details:</b><br> | ||
| + | Imaged 18 July 2003 in Hong Kong with a 212 mm Newtonian Cassegrain and a 2x Barlow and Phillips Toucam Pro | ||
| + | webcam. 212 frames were stacked and the seeing was good (8/10) and transparency fair (5/20). </p> | ||
| + | <p class"story"><b>Related Links:</b><br> | ||
| + | [http://observingthesky.org/index.php?p=174 KC Pau]<br> | ||
| + | [http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_091_h2.jpg Lunar Orbiter image]</p> | ||
| + | <p class"story"> <b>Tomorrow's LPOD:</b> Hooke & Hipparchus</p> | ||
| + | <p><img src="../../../MainPage/spacer.gif" width="640" height="1"></p></td></tr> | ||
| + | </table> | ||
| + | |||
| + | </td> | ||
| + | </tr> | ||
| + | |||
| + | <tr> | ||
| + | <td colspan="2" rowspan="1"> | ||
| + | <!-- start bottom --> | ||
| + | <table width="100%" border="0" cellspacing="2" cellpadding="4"> | ||
| + | <tr> | ||
| + | <td><hr width="640"></td> | ||
| + | </tr> | ||
| + | <tr> | ||
| + | <td><p align="center" class="main_titles"><b>Author & Editor:</b><br> | ||
| + | [mailto:chuck@observingthesky.org Charles A. Wood]</p> | ||
| + | <p align="center" class="main_titles"><b>Technical Consultant:</b><br> | ||
| + | [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> | ||
| + | </tr> | ||
| + | </table> | ||
| + | |||
| + | |||
| + | <p> </p> | ||
Revision as of 15:34, 4 January 2015
Lake of Death
Lake of Death |
January 30, 2004 |
<IMG SRC="images/LPOD-2004-01-30.jpeg" NAME="main_image" width="498" height="400" border="0"> |
Image Credit: <A class="one" HREF="mailto:kcpaulhk@yahoo.com.hk">K.C. Pau</A> |
|
Lake of Death Do you consider Lacus Mortis - The Lake of Death - a crater? Because of the mare-like term "lacus" some observers just see it as a patch of mare material linking Mare Frigoris and Lacus Somniorum. But if you linger, taking your eyes off the challenging rilles and superposed crater Burg, you will easily notice low walls that enclose nearly the entire lake. I say "walls" rather than "rim" for the latter term implies a rampart that projects above the surrounding environs, and these don't. Lacus Mortis is a depression lower than most of its surroundings, especially the rubbly plateau to the west. Notice the faint diagonal lineations in the rubbly material? They are probably flow marks in this jumble of ejecta from the Imbrium basin. Notice also that the walls of Lacus Mortis do not define a circle or an ellipse - they have distinct straight edges. These linear wall segments are part of the lunar grid system, marked also by the polygonal sides of Ptolemaeus, the [LPOD-2004-01-11.htm Straight Wall], the Alpine Valley and other straight features. Some of these linear features are related to basins, but others could have formed by tidal stressing early in lunar history when the Moon was much closer to Earth. Technical Details: Related Links: Tomorrow's LPOD: Hooke & Hipparchus <img src="../../../MainPage/spacer.gif" width="640" height="1"> |
Author & Editor: Technical Consultant: A service of: Visit these other PODs: |
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
