Difference between revisions of "April 7, 2004"
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=Colorful Privolva= | =Colorful Privolva= | ||
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| − | + | <td colspan="2"><div align="center"> | |
| − | + | [javascript:;" onMouseOver="MM_swapImage('main_image','','images/LPOD-2004-04-07b.jpeg',1)" onMouseOut="MM_swapImgRestore() [[File:LPOD-2004-04-07.jpeg|LPOD-2004-04-07.jpeg]]]</div> | |
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| − | + | <td><div align="center" span class="main_sm">Image Credit: [mailto:robinson@eros.earth.northwestern.edu Mark Robinson]</div></td> | |
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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 class="story" align="center"><b>Colorful Privolva </b></p> | |
| − | + | <p class="story" align="left"> This alien landscape is not one of the satellites of Jupiter - it is the out of sight, totally out of mind | |
| − | + | farside of our own Moon. Kepler wrote a science fiction story, <I>Somnium</I> or Dream, about a trip to the Moon. | |
| − | + | He called the farside Privolva, which meant "Out of Sight of Earth". Privolva doesn't look like out familiar | |
| − | + | nearside. There are few dark maria deposits - the lack of such a pattern makes finding your way around difficult - | |
| − | + | I'll be glad when the Bussey & Spudis <I>Clementine Atlas</I> arrives so I can identify more craters! The farside | |
| − | + | is essentially the nearside's cratered highlands expanded to fill a hemisphere. There are a number of rayed | |
| − | + | craters, including Jackson (mouse over for names), whose asymmetric ray pattern demonstrates resulted from an | |
| − | + | oblique impact. But the main feature of Privolva is the huge darkish circle in the southern part of the image. | |
| − | + | This is the 2500 km wide South Pole - Aitken impact basin, or as I like to call it, the Big Backside Basin. | |
| − | + | Although there is some dark-hued mare material inside the BBB, the coloration is thought to be due to the | |
| − | + | excavation of lunar mantle rocks that are noritic in composition. Norites are igneous rocks that include roughly | |
| − | + | equal amounts of two contrasting minerals: bright plagioclase feldspar and dark iron and magnesium rich pyroxene. | |
| − | + | Having lunar mantle rocks at the surface makes the BBB a prime target for future sample return missions. </p> | |
| − | + | <blockquote> | |
| − | + | <p align="right" class="story">— [mailto:tychocrater@yahoo.com Chuck Wood]</p> | |
| − | + | </blockquote> <p><b>Technical Details:</b><br> | |
| − | + | This remarkable mosaic was constructed by Mark Robinson using Clementine images taken in three | |
| − | + | wavelengths: the 950 nm mosaic is displayed as red, the 750 nm mosaic as green, and the 415 nm | |
| − | + | mosaic as blue. Each coloration on the image above can be related to lunar surface composition, | |
| − | + | with the light blue color representing the youngest, impact-created glassy rocks. High resolution | |
| − | + | images of the near and far side color mosaics are available at Mark's web site. </p> | |
| − | + | <p class="story"><b>Related Links:</b><br> | |
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[http://cps.earth.northwestern.edu/index.html Mark Robinson Web Site]<br> | [http://cps.earth.northwestern.edu/index.html Mark Robinson Web Site]<br> | ||
| − | + | [http://www.depauw.edu/sfs/backissues/8/christianson8art.htm Kepler's Somnium]</p> | |
| − | + | <p class="story"> <b>Tomorrow's LPOD:</b> Sneaky Schneckenberg</p> | |
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| − | + | <!-- start bottom --> | |
| − | + | <hr> | |
| − | + | <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>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/ ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</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 18:18, 4 January 2015
Colorful Privolva
[javascript:;" onMouseOver="MM_swapImage('main_image',,'images/LPOD-2004-04-07b.jpeg',1)" onMouseOut="MM_swapImgRestore()
 ] |
Image Credit: Mark Robinson |
|
Colorful Privolva This alien landscape is not one of the satellites of Jupiter - it is the out of sight, totally out of mind farside of our own Moon. Kepler wrote a science fiction story, Somnium or Dream, about a trip to the Moon. He called the farside Privolva, which meant "Out of Sight of Earth". Privolva doesn't look like out familiar nearside. There are few dark maria deposits - the lack of such a pattern makes finding your way around difficult - I'll be glad when the Bussey & Spudis Clementine Atlas arrives so I can identify more craters! The farside is essentially the nearside's cratered highlands expanded to fill a hemisphere. There are a number of rayed craters, including Jackson (mouse over for names), whose asymmetric ray pattern demonstrates resulted from an oblique impact. But the main feature of Privolva is the huge darkish circle in the southern part of the image. This is the 2500 km wide South Pole - Aitken impact basin, or as I like to call it, the Big Backside Basin. Although there is some dark-hued mare material inside the BBB, the coloration is thought to be due to the excavation of lunar mantle rocks that are noritic in composition. Norites are igneous rocks that include roughly equal amounts of two contrasting minerals: bright plagioclase feldspar and dark iron and magnesium rich pyroxene. Having lunar mantle rocks at the surface makes the BBB a prime target for future sample return missions. Technical Details: This remarkable mosaic was constructed by Mark Robinson using Clementine images taken in three wavelengths: the 950 nm mosaic is displayed as red, the 750 nm mosaic as green, and the 415 nm mosaic as blue. Each coloration on the image above can be related to lunar surface composition, with the light blue color representing the youngest, impact-created glassy rocks. High resolution images of the near and far side color mosaics are available at Mark's web site.Related Links: Tomorrow's LPOD: Sneaky Schneckenberg |
Author & Editor:
Charles A. Wood
Technical Consultant:
Anthony Ayiomamitis
A service of:
ObservingTheSky.Org
Visit these other PODs:
Astronomy | Mars | Earth
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
