Astronomy Picture of the Day: Moon Over Andromeda


	Astronomy Picture of the Day: Moon Over Andromeda

travislaborde

12-28-2006 7:56 AM

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tags:

astronomy, moon, space, images

1 Comment |

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12-28-2006 10:31 AM

haraya

...beautiful blue star clusters in spiral arms far beyond the bright yellow core...

So romantic.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/41a53f28-6dab-477c-a75c-687e3b8fd795/99CCDD4F-5C27-4873-9843-0D6B9F89144E/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://antwrp.gsfc.nasa.gov/apod/astropix.html" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html" style="font-size: 11px;">antwrp.gsfc.nasa.gov</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/astropix.html"><H1> Astronomy Picture of the Day </H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/astropix.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/antwrp.gsfc.nasa.gov/img/16F3FF3D-2C56-46A2-8DC6-1E6A2B9837F7" alt="See Explanation.  Clicking on the picture will download
 the highest resolution version available." /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/astropix.html"><B> Moon Over Andromeda </B></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/astropix.html"><P>
<B> Explanation: </B>
The Great Spiral <A href="http://antwrp.gsfc.nasa.gov/apod/ap051222.html">Galaxy
in Andromeda</A> (aka M31), a mere 2.5 million
light-years <A href="http://arxiv.org/abs/astro-ph/0511045">distant</A>,
is the closest
large spiral to our own Milky Way.
Andromeda is visible to the unaided eye as a small, faint, fuzzy patch,
but because its surface brightness is so low, casual
<A href="http://www.physics.ucla.edu/%7Ehuffman/m31.html">skygazers</A> can't
appreciate the galaxy's impressive extent in planet Earth's sky.
This entertaining composite image compares the
<A href="http://chandra.harvard.edu/photo/scale.html">angular size</A>
of the nearby galaxy
to a brighter, more familiar celestial sight.
In it, a
<A href="http://www.caelumobservatory.com/gallery/m31abtp.shtml">deep
exposure of Andromeda</A>, tracing beautiful blue star
clusters in spiral arms far beyond the bright yellow core,
is combined with a typical view of a nearly full Moon.
Shown at the same angular scale, the Moon covers about 1/2 degree on the
sky, while <A href="http://www.regulusastro.com/regulus/papers/%0Am31/">the galaxy is clearly</A> several times that size.
The deep Andromeda exposure also includes two bright satellite
galaxies, <A href="http://antwrp.gsfc.nasa.gov/apod/ap991103.html">M32</A> and
<A href="http://antwrp.gsfc.nasa.gov/apod/ap060908.html">M110</A> (bottom).
</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/99CCDD4F-5C27-4873-9843-0D6B9F89144E/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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