Difference between revisions of "April 25, 2005"
| Line 8: | Line 8: | ||
<table width="85%" border="0" align="center" cellpadding="6" cellspacing="2"> | <table width="85%" border="0" align="center" cellpadding="6" cellspacing="2"> | ||
<tr><td colspan="2" valign="top"><div align="center"> | <tr><td colspan="2" valign="top"><div align="center"> | ||
| − | + | [[File:LPOD-2005-04-25.jpeg|LPOD-2005-04-25.jpeg]] | |
</div></td> | </div></td> | ||
</tr> | </tr> | ||
| Line 20: | Line 20: | ||
<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>A Chain of Mystery</b></p> | <p align="center"><b>A Chain of Mystery</b></p> | ||
| − | <p align="left">Astronomers have apparently failed to notice that the Moon is getting closer to the earth. That is a possible conclusion, based upon the continually improving ability of amateurs to image delicate features previously at or beyond capabilities of even the largest observatory telescopes. Consider the Triesnecker Rilles, the rille on the floor of the Alpine Valley, and the Davy crater chain - all are well known lunar features that used to be very difficult to observe or image. And now, as Paolos impressive image of the Davy chain demonstrates, amateurs are acquiring images of near-spacecraft quality. I explained the probable origin of the Davy chain in two earlier LPODs - [ | + | <p align="left">Astronomers have apparently failed to notice that the Moon is getting closer to the earth. That is a possible conclusion, based upon the continually improving ability of amateurs to image delicate features previously at or beyond capabilities of even the largest observatory telescopes. Consider the Triesnecker Rilles, the rille on the floor of the Alpine Valley, and the Davy crater chain - all are well known lunar features that used to be very difficult to observe or image. And now, as Paolos impressive image of the Davy chain demonstrates, amateurs are acquiring images of near-spacecraft quality. I explained the probable origin of the Davy chain in two earlier LPODs - [[January_27,_2004|Jan 27, 04]] and [[July_14,_2004|Jul 14, 04]] - as a rat-a-tat-tat of near simultaneous impacts of fragments from a disintegrated comet. But you can see other things in this image too. Note the large, sharp crater (Davy G) at the right end of the chain - it isnt related to the chain craters but makes it easy to find an inconspicuous crater. Just left of G there is a ruined crater that is a little larger than 35 km Davy at the bottom left. This ruin has been draped by ejecta from the Imbrium basin and only a vague rim and shallow depression remain. |
</p> | </p> | ||
<blockquote><p align="right">— [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote> | <blockquote><p align="right">— [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote> | ||
| Line 41: | Line 41: | ||
[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p> | [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p> | ||
<p align="center" class="main_titles"><b>Contact Translator:</b><br> | <p align="center" class="main_titles"><b>Contact Translator:</b><br> | ||
| − | [mailto:pablolonnie@yahoo.com.mx | + | [mailto:pablolonnie@yahoo.com.mx Pablo Lonnie Pacheco Railey] (Es)<br> |
| − | [mailto:chlegrand@free.fr | + | [mailto:chlegrand@free.fr 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/ | + | [http://www.observingthesky.org/ 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 | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p> |
</td></tr> | </td></tr> | ||
</table> | </table> | ||
Revision as of 14:32, 17 January 2015
A Chain of Mystery
<nobr>A Chain of Mystery</nobr> |
|
Image Credit: Paolo Lazzarotti
|
|
A Chain of Mystery Astronomers have apparently failed to notice that the Moon is getting closer to the earth. That is a possible conclusion, based upon the continually improving ability of amateurs to image delicate features previously at or beyond capabilities of even the largest observatory telescopes. Consider the Triesnecker Rilles, the rille on the floor of the Alpine Valley, and the Davy crater chain - all are well known lunar features that used to be very difficult to observe or image. And now, as Paolos impressive image of the Davy chain demonstrates, amateurs are acquiring images of near-spacecraft quality. I explained the probable origin of the Davy chain in two earlier LPODs - Jan 27, 04 and Jul 14, 04 - as a rat-a-tat-tat of near simultaneous impacts of fragments from a disintegrated comet. But you can see other things in this image too. Note the large, sharp crater (Davy G) at the right end of the chain - it isnt related to the chain craters but makes it easy to find an inconspicuous crater. Just left of G there is a ruined crater that is a little larger than 35 km Davy at the bottom left. This ruin has been draped by ejecta from the Imbrium basin and only a vague rim and shallow depression remain. Technical Details: Related Links: Tomorrow's LPOD: Unknown right now! |
|
Author & Editor: Technical Consultant: Contact Translator: A service of: |
COMMENTS?
Register, and click on the Discussion tab at the top of the page.
