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	<title>Comments on: Jupiter, looking sharp</title>
	<atom:link href="http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/feed/" rel="self" type="application/rss+xml" />
	<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/</link>
	<description>I am an astronomer, writer, and skeptic. I likes reality the way it is, and I aims to keep it that way. My real name is Phil Plait, and I run the Bad Astronomy blog.</description>
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		<title>By: MarkH</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122979</link>
		<dc:creator>MarkH</dc:creator>
		<pubDate>Fri, 03 Oct 2008 16:44:51 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122979</guid>
		<description>@ Tig

Yes I did. But brainlocked on the name of the movie.
For some reason I had Wierd Science on the brain.

Great picture, yet one more to add to my wall paper collection. :)</description>
		<content:encoded><![CDATA[<p>@ Tig</p>
<p>Yes I did. But brainlocked on the name of the movie.<br />
For some reason I had Wierd Science on the brain.</p>
<p>Great picture, yet one more to add to my wall paper collection. <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
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		<title>By: Rev. BigDumbChimp</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122970</link>
		<dc:creator>Rev. BigDumbChimp</dc:creator>
		<pubDate>Fri, 03 Oct 2008 16:14:29 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122970</guid>
		<description>&lt;blockquote&gt;The Earth’s atmosphere roils and waves, distorting ground-based views of the sky. That’s one of the reasons we launch telescopes into space, to get above all that mess. But if you can observe a point-like object such as a star at the same time you observe your target object, it’s possible to compensate for the distortion by taking extremely rapid fire snapshots and measuring the way the star image changes. You then apply a correction to the image, and presto! It’s cleaner. However, you can only do this for the area near the star. Distortions change across a telescope’s field of view, making this technique somewhat limited&lt;/blockquote&gt;

Interestingly that&#039;s some what, sort of, kind of how we used to correct for government scrambled GPS when I was in college. Take a known location point and time then reference GPS data against it to correct for what the Gov&#039;t used to do to the GPS signals.</description>
		<content:encoded><![CDATA[<blockquote><p>The Earth’s atmosphere roils and waves, distorting ground-based views of the sky. That’s one of the reasons we launch telescopes into space, to get above all that mess. But if you can observe a point-like object such as a star at the same time you observe your target object, it’s possible to compensate for the distortion by taking extremely rapid fire snapshots and measuring the way the star image changes. You then apply a correction to the image, and presto! It’s cleaner. However, you can only do this for the area near the star. Distortions change across a telescope’s field of view, making this technique somewhat limited</p></blockquote>
<p>Interestingly that&#8217;s some what, sort of, kind of how we used to correct for government scrambled GPS when I was in college. Take a known location point and time then reference GPS data against it to correct for what the Gov&#8217;t used to do to the GPS signals.</p>
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		<title>By: American Voyager</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122930</link>
		<dc:creator>American Voyager</dc:creator>
		<pubDate>Fri, 03 Oct 2008 12:07:10 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122930</guid>
		<description>Macron,

Sounds like space based optical telescopes may become obsolete though.  What a thought!  I never thought I&#039;d hear of a day that ground would surpass Hubble.  I wonder how much detail this could show on Jupiter&#039;s moons.</description>
		<content:encoded><![CDATA[<p>Macron,</p>
<p>Sounds like space based optical telescopes may become obsolete though.  What a thought!  I never thought I&#8217;d hear of a day that ground would surpass Hubble.  I wonder how much detail this could show on Jupiter&#8217;s moons.</p>
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		<title>By: Nigel Depledge</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122929</link>
		<dc:creator>Nigel Depledge</dc:creator>
		<pubDate>Fri, 03 Oct 2008 12:06:30 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122929</guid>
		<description>theinquisitor said:
&lt;blockquote&gt;Will this technique make space-based telescopes obsolete?&lt;/blockquote&gt;

Only to a limited extent.  As Macron points out, there are several wavebands that are strongly absorbed by our atmosphere.  Additionally, no amount of adaptive optics will allow you to see through a cloud, so a space telescope will always get more observing time than a ground-based one.  Also, good observing sites on Earth are in short supply (due to weather, light pollution or whatever).

Putting adaptive optics on a telescope in an old observatory may not be hugely productive in some cases, due to light pollution.

Although, you can probably get 20 MAD telescopes on the ground for the price of one space-based one.</description>
		<content:encoded><![CDATA[<p>theinquisitor said:</p>
<blockquote><p>Will this technique make space-based telescopes obsolete?</p></blockquote>
<p>Only to a limited extent.  As Macron points out, there are several wavebands that are strongly absorbed by our atmosphere.  Additionally, no amount of adaptive optics will allow you to see through a cloud, so a space telescope will always get more observing time than a ground-based one.  Also, good observing sites on Earth are in short supply (due to weather, light pollution or whatever).</p>
<p>Putting adaptive optics on a telescope in an old observatory may not be hugely productive in some cases, due to light pollution.</p>
<p>Although, you can probably get 20 MAD telescopes on the ground for the price of one space-based one.</p>
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		<title>By: Macron</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122867</link>
		<dc:creator>Macron</dc:creator>
		<pubDate>Fri, 03 Oct 2008 01:31:14 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122867</guid>
		<description>*supposedly</description>
		<content:encoded><![CDATA[<p>*supposedly</p>
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		<title>By: Macron</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122866</link>
		<dc:creator>Macron</dc:creator>
		<pubDate>Fri, 03 Oct 2008 01:30:53 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/#comment-122866</guid>
		<description>&quot;Will this technique make space-based telescopes obsolete?&quot;

Phil answered that question back in May, when I asked it in a video chat.  He supposed recorded it, but it never made it onto his youtube channel.

He said no, because space-based telescopes can still be used to see forms of radiation that get absorbed by the atmosphere.</description>
		<content:encoded><![CDATA[<p>&#8220;Will this technique make space-based telescopes obsolete?&#8221;</p>
<p>Phil answered that question back in May, when I asked it in a video chat.  He supposed recorded it, but it never made it onto his youtube channel.</p>
<p>He said no, because space-based telescopes can still be used to see forms of radiation that get absorbed by the atmosphere.</p>
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		<title>By: Neat Ground-Based Jupiter Photos &#171; Tranching Reality</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2008/10/02/jupiter-looking-sharp/comment-page-1/#comment-122857</link>
		<dc:creator>Neat Ground-Based Jupiter Photos &#171; Tranching Reality</dc:creator>
		<pubDate>Fri, 03 Oct 2008 00:57:21 +0000</pubDate>
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		<description>[...] Neat Ground-Based Jupiter&#160;Photos  Jump to Comments Via Bad Astronomy: [...]</description>
		<content:encoded><![CDATA[<p>[...] Neat Ground-Based Jupiter&nbsp;Photos  Jump to Comments Via Bad Astronomy: [...]</p>
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