Difference between revisions of "September 24, 2004"

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=Tranquil Sunshine=
 
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<p align="center">[[File:LPOD-2004-09-24.jpeg|LPOD-2004-09-24.jpeg]]]
 
 
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<td><div align="center" class="main_sm">Image Credit: [mailto:kcpaulhk@yahoo.com.hk KC Pau]</p>
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<td><div align="center" class="main_sm"><p>Image Credit: [mailto:kcpaulhk@yahoo.com.hk KC Pau]</p>
 
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<p align="left">Last month, LPOD featured KC Pau's image of a full Moon view of [[August_27,_2004|Mare Serenitatis]];  here is the companion, shot on the same night, of Mare Tranquilitatis. Once again when the sun is overhead and shadows disappear, a less familiar Moon appears. As you sweep your eye over the mare, it becomes obvious that it is not all the same hue. A series of rather large light circles extend from near Arago to Carrel to Jansen (see mouseover). These are the areas of slightly higher surface structures that I call the Lamont-Gardner [[August_16,_2004|Megadome  Alignment]]. Another more delicate type of feature, only visible near high noon, is a dark rim around some craters. Dawes has such a collar, as do the five craters I've arrowed, but the really amazing dark ray crater is Dionysius - take a look! These dark collars and rays are due to the crater ejecting dark mare material that must be beneath the lighter surface rocks. Finally, notice the bright-rimmed craters. Proclus, with its asymmetric rays is obvious, but also look at Theon Junior and Senior. Bright rimmed craters expose fresh surfaces (due to landslides) that have not yet been darkened by solar radiation. These are some of the youngest craters on the Moon.
 
<p align="left">Last month, LPOD featured KC Pau's image of a full Moon view of [[August_27,_2004|Mare Serenitatis]];  here is the companion, shot on the same night, of Mare Tranquilitatis. Once again when the sun is overhead and shadows disappear, a less familiar Moon appears. As you sweep your eye over the mare, it becomes obvious that it is not all the same hue. A series of rather large light circles extend from near Arago to Carrel to Jansen (see mouseover). These are the areas of slightly higher surface structures that I call the Lamont-Gardner [[August_16,_2004|Megadome  Alignment]]. Another more delicate type of feature, only visible near high noon, is a dark rim around some craters. Dawes has such a collar, as do the five craters I've arrowed, but the really amazing dark ray crater is Dionysius - take a look! These dark collars and rays are due to the crater ejecting dark mare material that must be beneath the lighter surface rocks. Finally, notice the bright-rimmed craters. Proclus, with its asymmetric rays is obvious, but also look at Theon Junior and Senior. Bright rimmed craters expose fresh surfaces (due to landslides) that have not yet been darkened by solar radiation. These are some of the youngest craters on the Moon.
 
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<blockquote><p align="right">&#8212; [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote>
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<p align="left"><p><b>Technical Details:</b><br>
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<p align="right">&#8212; [mailto:tychocrater@yahoo.com Chuck Wood]</p></blockquote>
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<p align="left"><b>Technical Details:</b><br>
 
July 31, 2004, 250 mm f/6 Newtonian at prime focus + Toucan Pro webcam</p>
 
July 31, 2004, 250 mm f/6 Newtonian at prime focus + Toucan Pro webcam</p>
 
<p><b>Related Links:</b><br>
 
<p><b>Related Links:</b><br>
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[http://skyandtelescope.com/observing/objects/moon/article_1332_1.asp Observing the Full Moon]
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[http://skyandtelescope.com/observing/objects/moon/article_1332_1.asp Observing the Full Moon]</p>
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<p align="left"><b>Tomorrow's LPOD: </b> Trough and Pancake </p>
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<p><b>Yesterday's LPOD:</b> [[September 23, 2004|Lunar Crater Types]] </p>
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<p><b>Tomorrow's LPOD:</b> [[September 25, 2004|Trough and Pancake]] </p>
 
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<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
 
<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
 
[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
 
[mailto:tychocrater@yahoo.com 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>Contacte al Traductor:</b><br>
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[mailto:pablolonnie@yahoo.com.mx Pablo Lonnie Pacheco Railey ]</p>
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<p align="center" class="main_titles"><b>[mailto:webuser@observingthesky.org Contact Webmaster]</b></p>
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<p align="center" class="main_titles"><b>A service of:</b><br>
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[http://www.observingthesky.org/ ObservingTheSky.Org]</p>
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<p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
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[http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p>
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===COMMENTS?===
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Latest revision as of 13:54, 15 March 2015

Tranquil Sunshine


LPOD-2004-09-24.jpeg

LPOD-2004-09-24b.jpeg

Image Credit: KC Pau


Tranquil Sunshine

Last month, LPOD featured KC Pau's image of a full Moon view of Mare Serenitatis; here is the companion, shot on the same night, of Mare Tranquilitatis. Once again when the sun is overhead and shadows disappear, a less familiar Moon appears. As you sweep your eye over the mare, it becomes obvious that it is not all the same hue. A series of rather large light circles extend from near Arago to Carrel to Jansen (see mouseover). These are the areas of slightly higher surface structures that I call the Lamont-Gardner Megadome Alignment. Another more delicate type of feature, only visible near high noon, is a dark rim around some craters. Dawes has such a collar, as do the five craters I've arrowed, but the really amazing dark ray crater is Dionysius - take a look! These dark collars and rays are due to the crater ejecting dark mare material that must be beneath the lighter surface rocks. Finally, notice the bright-rimmed craters. Proclus, with its asymmetric rays is obvious, but also look at Theon Junior and Senior. Bright rimmed craters expose fresh surfaces (due to landslides) that have not yet been darkened by solar radiation. These are some of the youngest craters on the Moon.

— Chuck Wood

Technical Details:
July 31, 2004, 250 mm f/6 Newtonian at prime focus + Toucan Pro webcam

Related Links:
Observing the Full Moon

Yesterday's LPOD: Lunar Crater Types

Tomorrow's LPOD: Trough and Pancake


Author & Editor:
Charles A. Wood

COMMENTS?

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