Difference between revisions of "October 26, 2004"
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| − | + | <td width="50%"><h2><nobr>Eclipse Preview</nobr></h2></td> | |
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</table> | </table> | ||
<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"> | |
| − | + | <img src="archive/2004/10/images/LPOD-2004-10-26.jpeg" border="0"> | |
| − | + | </div></td> | |
| − | + | </tr> | |
</table> | </table> | ||
<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:ericj@leapmail.net Eric Jamison]</p> | |
| − | + | </div></td> | |
| − | + | </tr> | |
| − | + | </table> | |
<br> | <br> | ||
<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>Eclipse Preview</b></p> | |
| − | + | <p align="left">There are usually 1-2 lunar eclipses each year, and the nice thing is that each one is visible from half the Earth. This image of the November 8, 2003 eclipse shows the Moon at maximum eclipse, but as you can see the lunar south polar area was quite bright. This was because it was just barely a total eclipse - the south pole of the Moon skimmed along the edge of the umbral (or darkest) shadow. The October 27, 2004 (28th in Europe) eclipse should be darker because the Moon passes well within the umbra. During totality on the 27th, the north pole will be the brighter side because it will be closest to the edge of the umbra. Despite the fact that the lunar orbit is very predictable, the color and darkness of eclipses are not. The problem is that these hues depend upon the clarity of the Earth's atmosphere, but of course that varies with time and place. The atmosphere can be full of debris (that blocks sunlight and darkens eclipses) from forest fires, volcanic eruptions or even recent meteor showers. For the October 27th eclipse none of these atmospheric perturbations should be severe so a bright eclipse is expected. Visit the <i>Sky & Telescope</i> web site to learn the Danjon Scale for eclipse brightnesses and then you can judge how bright totality actually is. Clear skies!</p> | |
| − | + | <blockquote><p align="right">— [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> | ||
Nov. 8, 2003. mid-eclipse using an AP 7.1" f/9 on AP 800 equatorial mount. Exposure 12 seconds on ASA 400 speed film using my trusty Olympus OM-1 camera. </p> | Nov. 8, 2003. mid-eclipse using an AP 7.1" f/9 on AP 800 equatorial mount. Exposure 12 seconds on ASA 400 speed film using my trusty Olympus OM-1 camera. </p> | ||
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<br>[http://members.leapmail.net/~ericj/ Eric's web site] | <br>[http://members.leapmail.net/~ericj/ Eric's web site] | ||
<p align="left"><b>Tomorrow's LPOD: </b> The Moon by Day</p> | <p align="left"><b>Tomorrow's LPOD: </b> The Moon by Day</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 18:26, 4 January 2015
Eclipse Preview
<nobr>Eclipse Preview</nobr> |
<img src="archive/2004/10/images/LPOD-2004-10-26.jpeg" border="0"> |
Image Credit: Eric Jamison
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Eclipse Preview There are usually 1-2 lunar eclipses each year, and the nice thing is that each one is visible from half the Earth. This image of the November 8, 2003 eclipse shows the Moon at maximum eclipse, but as you can see the lunar south polar area was quite bright. This was because it was just barely a total eclipse - the south pole of the Moon skimmed along the edge of the umbral (or darkest) shadow. The October 27, 2004 (28th in Europe) eclipse should be darker because the Moon passes well within the umbra. During totality on the 27th, the north pole will be the brighter side because it will be closest to the edge of the umbra. Despite the fact that the lunar orbit is very predictable, the color and darkness of eclipses are not. The problem is that these hues depend upon the clarity of the Earth's atmosphere, but of course that varies with time and place. The atmosphere can be full of debris (that blocks sunlight and darkens eclipses) from forest fires, volcanic eruptions or even recent meteor showers. For the October 27th eclipse none of these atmospheric perturbations should be severe so a bright eclipse is expected. Visit the Sky & Telescope web site to learn the Danjon Scale for eclipse brightnesses and then you can judge how bright totality actually is. Clear skies! Technical Details: Related Links: Tomorrow's LPOD: The Moon by Day |
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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.
