Difference between revisions of "May 8, 2005"
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| − | + | <td width="50%"><h2><nobr>Splayed Rays</nobr></h2></td> | |
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| − | + | <tr><td colspan="2" valign="top"><div align="center"> | |
| − | + | <img src="archive/2005/05/images/LPOD-2005-05-08.jpeg" border="0"> | |
| − | + | </div></td> | |
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<table width="80%" border="0" align="center" cellpadding="8"> | <table width="80%" border="0" align="center" cellpadding="8"> | ||
| − | + | <tr><td><div align="center" class="main_sm">Image Credit: [mailto:Behaegel@pandora.be Christophe Behaegel]</p> | |
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | ||
| − | + | <p align="center"><b>Splayed Rays</b></p> | |
| − | + | <p align="left">Did you ever put a magnet under a sheet of paper and sprinkle iron fillings on top? Did you ever do it with three magnets? If so youd get something similar to this high sun view of rays splaying out from Copernicus (top right), Kepler (lower center) and Aristarchus (middle left). The rays radiate in all directions, and some seem to connect the three craters into a giant triangle. This image shows the variations in the nature of rays, even at a single crater. Rays are perhaps the most difficult type of lunar features to classify, and no classification scheme is commonly used to describe their shapes. Most of the rays from these three craters are relatively narrow but some are much wider. Copernicus has narrow, wispy rays extending in all directions, and wide, semi-parallel rays leading towards Aristarchus and crossing Imbrium. Keplers rays are mostly thin and non-distinct to the east, but there are four broad rays to the west, with sharp boundaries with the maria. Aristarchus rays are the least conspicuous of the three, and are most visible to its east. All three craters are surrounded by broad annular regions about 1-2 crater diameters wide. This is equivalent to the bright nimbus often seen around tiny fresh craters at full Moon. Curiously, there is not a modern catalog of rayed craters; one must go back to the classical moon mappers such as Schmidt and [http://cwm.lpod.org/DataStuff/rays.htm Elger] to find a thorough listing.</p> | |
| − | + | <blockquote><p align="right">— [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote> | |
<p align="left"><p><b>Related Links:</b><br> | <p align="left"><p><b>Related Links:</b><br> | ||
[http://www.psrd.hawaii.edu/Sept04/LunarRays.html Lunar Crater Rays] | [http://www.psrd.hawaii.edu/Sept04/LunarRays.html Lunar Crater Rays] | ||
<p align="left"><b>Tomorrow's LPOD: </b> The Source of Lunar Nomenclature</p> | <p align="left"><b>Tomorrow's LPOD: </b> The Source of Lunar Nomenclature</p> | ||
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</table> | </table> | ||
<br> | <br> | ||
<table width="100%" border="0" cellspacing="2" cellpadding="4"> | <table width="100%" border="0" cellspacing="2" cellpadding="4"> | ||
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| − | + | <td><hr></td> | |
| − | + | </tr> | |
| − | + | <tr><td> | |
| − | + | <p align="center" class="main_titles"><b>Author & Editor:</b><br> | |
| − | + | [mailto:tychocrater@yahoo.com 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>Contact Translator:</b><br> | |
| − | + | [mailto:pablolonnie@yahoo.com.mx" class="one Pablo Lonnie Pacheco Railey] (Es)<br> | |
| − | + | [mailto:chlegrand@free.fr" class="one Christian Legrand] (Fr)</p> | |
| − | + | <p align="center" class="main_titles"><b>[mailto:webuser@observingthesky.org Contact Webmaster]</b></p> | |
| − | + | <p align="center" class="main_titles"><b>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/" class="one ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html" class="one Astronomy] | [http://www.msss.com/" class="one Mars] | [http://epod.usra.edu/" class="one Earth]</p> | |
| − | + | </td></tr> | |
</table> | </table> | ||
<p> </p> | <p> </p> | ||
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===COMMENTS?=== | ===COMMENTS?=== | ||
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | ||
Revision as of 17:32, 4 January 2015
Splayed Rays
<nobr>Splayed Rays</nobr> |
<img src="archive/2005/05/images/LPOD-2005-05-08.jpeg" border="0"> |
Image Credit: Christophe Behaegel
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Splayed Rays Did you ever put a magnet under a sheet of paper and sprinkle iron fillings on top? Did you ever do it with three magnets? If so youd get something similar to this high sun view of rays splaying out from Copernicus (top right), Kepler (lower center) and Aristarchus (middle left). The rays radiate in all directions, and some seem to connect the three craters into a giant triangle. This image shows the variations in the nature of rays, even at a single crater. Rays are perhaps the most difficult type of lunar features to classify, and no classification scheme is commonly used to describe their shapes. Most of the rays from these three craters are relatively narrow but some are much wider. Copernicus has narrow, wispy rays extending in all directions, and wide, semi-parallel rays leading towards Aristarchus and crossing Imbrium. Keplers rays are mostly thin and non-distinct to the east, but there are four broad rays to the west, with sharp boundaries with the maria. Aristarchus rays are the least conspicuous of the three, and are most visible to its east. All three craters are surrounded by broad annular regions about 1-2 crater diameters wide. This is equivalent to the bright nimbus often seen around tiny fresh craters at full Moon. Curiously, there is not a modern catalog of rayed craters; one must go back to the classical moon mappers such as Schmidt and Elger to find a thorough listing. Related Links: Tomorrow's LPOD: The Source of Lunar Nomenclature |
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Author & Editor: Technical Consultant: Contact Translator: A service of: Visit these other PODs: |
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
