Difference between revisions of "November 5, 2004"

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=Bright & Dark=
 
=Bright & Dark=
 
 
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<td width="50%"><h2><nobr>Bright & Dark</nobr></h2></td>
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<table width="80%"  border="0" align="center" cellpadding="8">
 
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    <tr><td><div align="center" class="main_sm">Image Credit: <a class="one" href="info@astromeccanica.it">Paolo Lazzarotti</a></p>
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<tr><td><div align="center" class="main_sm">Image Credit: [info@astromeccanica.it Paolo Lazzarotti]</p>
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
<p align="center"><b>Bright & Dark</b></p>
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<p align="center"><b>Bright & Dark</b></p>
<p align="left">First, I must apologize to Paolo for over-enhancing one of his very good mosaics of a 10-day old Moon! The purpose is to explore the extremes of light and dark that appear in this southeastern quadrant of the Moon. This is a region striped by Tycho's rays, and containing the very bright but small ray craters on both sides of Stevinus. It also has some lesser known ray craters west of Mare Nectaris, but perhaps more interesting are the dark splotches. Because of the good libration the mare material within the limb crater Humboldt is well seen, and there is a colony of dark-floored craters near Magelhaens at the western shore of Fecunditatis. Nectaris itself has a light hued surface, but containing a variety of dark spots. Southeast of Theophilus are two small dark halo craters. These haloes are not due to volcanic eruptions, but they are dark mare lavas excavated and spread as ejecta around the small craters. Similarly, there is a darkish ring around the rim of Rosse, which also has an associated radiating ray - from Copernicus? On the northern edge of Mare Nectaris is a very dark arc on the rim of  [http://www.lpod.org/LPOD-2004-10-23.htm Daguerre] - this is a volcanic pyroclastic deposit. The ill-defined, somewhat dark patches near the center of Nectaris and along it southeastern shore appear to be spectrally similar to the surrounding medium-titanium basalts, but they are darker. </p>
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<p align="left">First, I must apologize to Paolo for over-enhancing one of his very good mosaics of a 10-day old Moon! The purpose is to explore the extremes of light and dark that appear in this southeastern quadrant of the Moon. This is a region striped by Tycho's rays, and containing the very bright but small ray craters on both sides of Stevinus. It also has some lesser known ray craters west of Mare Nectaris, but perhaps more interesting are the dark splotches. Because of the good libration the mare material within the limb crater Humboldt is well seen, and there is a colony of dark-floored craters near Magelhaens at the western shore of Fecunditatis. Nectaris itself has a light hued surface, but containing a variety of dark spots. Southeast of Theophilus are two small dark halo craters. These haloes are not due to volcanic eruptions, but they are dark mare lavas excavated and spread as ejecta around the small craters. Similarly, there is a darkish ring around the rim of Rosse, which also has an associated radiating ray - from Copernicus? On the northern edge of Mare Nectaris is a very dark arc on the rim of  [http://www.lpod.org/LPOD-2004-10-23.htm Daguerre] - this is a volcanic pyroclastic deposit. The ill-defined, somewhat dark patches near the center of Nectaris and along it southeastern shore appear to be spectrally similar to the surrounding medium-titanium basalts, but they are darker. </p>
<blockquote><p align="right">&#8212; [mailto:chuck@observingthesky.org Chuck Wood]</blockquote>
+
<blockquote><p align="right">&#8212; [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote>
 
<p align="left"><p><b>Technical Details:</b><br>
 
<p align="left"><p><b>Technical Details:</b><br>
 
June 20, 2002.  178mm f/15 Mak-Cass + 0.63 reducer + Olympus Camedia</p>
 
June 20, 2002.  178mm f/15 Mak-Cass + 0.63 reducer + Olympus Camedia</p>
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[http://www.paololazzarotti.com/ Paolo's Earth & Sky Images]
 
[http://www.paololazzarotti.com/ Paolo's Earth & Sky Images]
 
<p align="left"><b>Tomorrow's LPOD: </b> Little Known Fault</p>
 
<p align="left"><b>Tomorrow's LPOD: </b> Little Known Fault</p>
<p><img src="MainPage/spacer.gif" width="640" height="1"></p></td>
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<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
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<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
[mailto:chuck@observingthesky.org Charles A. Wood]</p>
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[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
<p align="center" class="main_titles"><b>Technical Consultant:</b><br>
+
<p align="center" class="main_titles"><b>Technical Consultant:</b><br>
[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
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[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
<p align="center" class="main_titles"><b>Contact Translator:</b><br>
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<p align="center" class="main_titles"><b>Contact Translator:</b><br>
[mailto:pablolonnie@yahoo.com.mx" class="one Pablo Lonnie Pacheco Railey]  (Es)<br>
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[mailto:pablolonnie@yahoo.com.mx" class="one Pablo Lonnie Pacheco Railey]  (Es)<br>
[mailto:chlegrand@free.fr" class="one Christian Legrand] (Fr)</p>
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[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>[mailto:webuser@observingthesky.org Contact Webmaster]</b></p>
<p align="center" class="main_titles"><b>A service of:</b><br>
+
<p align="center" class="main_titles"><b>A service of:</b><br>
[http://www.observingthesky.org/" class="one ObservingTheSky.Org]</p>
+
[http://www.observingthesky.org/" class="one ObservingTheSky.Org]</p>
<p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
+
<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>
+
[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>
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</table>  
 
<p>&nbsp;</p>
 
<p>&nbsp;</p>
 
 
 
 
 
----
 
----
 
===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 18:27, 4 January 2015

Bright & Dark

<nobr>Bright & Dark</nobr>

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Image Credit: [info@astromeccanica.it Paolo Lazzarotti]</p>


Bright & Dark

First, I must apologize to Paolo for over-enhancing one of his very good mosaics of a 10-day old Moon! The purpose is to explore the extremes of light and dark that appear in this southeastern quadrant of the Moon. This is a region striped by Tycho's rays, and containing the very bright but small ray craters on both sides of Stevinus. It also has some lesser known ray craters west of Mare Nectaris, but perhaps more interesting are the dark splotches. Because of the good libration the mare material within the limb crater Humboldt is well seen, and there is a colony of dark-floored craters near Magelhaens at the western shore of Fecunditatis. Nectaris itself has a light hued surface, but containing a variety of dark spots. Southeast of Theophilus are two small dark halo craters. These haloes are not due to volcanic eruptions, but they are dark mare lavas excavated and spread as ejecta around the small craters. Similarly, there is a darkish ring around the rim of Rosse, which also has an associated radiating ray - from Copernicus? On the northern edge of Mare Nectaris is a very dark arc on the rim of Daguerre - this is a volcanic pyroclastic deposit. The ill-defined, somewhat dark patches near the center of Nectaris and along it southeastern shore appear to be spectrally similar to the surrounding medium-titanium basalts, but they are darker.

Chuck Wood</blockquote>

<p align="left"><p>Technical Details:

June 20, 2002. 178mm f/15 Mak-Cass + 0.63 reducer + Olympus Camedia

Related Links:
Paolo's Earth & Sky Images <p align="left">Tomorrow's LPOD: Little Known Fault

</tr> </table>


Author & Editor:
Charles A. Wood

Technical Consultant:
Anthony Ayiomamitis

Contact Translator:
" class="one Pablo Lonnie Pacheco Railey (Es)
" class="one Christian Legrand (Fr)

Contact Webmaster

A service of:
" class="one ObservingTheSky.Org

Visit these other PODs:
" class="one Astronomy | " class="one Mars | " class="one Earth

 


COMMENTS?

Click on this icon File:PostIcon.jpg at the upper right to post a comment.