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	<title>Comments on: Mars. Moon. No.</title>
	<atom:link href="http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/feed/" rel="self" type="application/rss+xml" />
	<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/</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>
	<lastBuildDate>Mon, 13 Feb 2012 21:42:46 +0000</lastBuildDate>
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		<title>By: Dr. Dufus</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-209411</link>
		<dc:creator>Dr. Dufus</dc:creator>
		<pubDate>Sat, 29 Aug 2009 03:01:00 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-209411</guid>
		<description>Mars, being at such a close location, would pull Earth from it&#039;s orbit enough to destroy mankind.  The fools who believe this, if anything, should be terrified out of their pants.  Whomever started this rumour go jump off a cliff into shark infested waters.  Don&#039;t forget to strap yourself to fresh dead fish!</description>
		<content:encoded><![CDATA[<p>Mars, being at such a close location, would pull Earth from it&#8217;s orbit enough to destroy mankind.  The fools who believe this, if anything, should be terrified out of their pants.  Whomever started this rumour go jump off a cliff into shark infested waters.  Don&#8217;t forget to strap yourself to fresh dead fish!</p>
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		<title>By: Skruffy</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-207808</link>
		<dc:creator>Skruffy</dc:creator>
		<pubDate>Fri, 21 Aug 2009 02:20:01 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-207808</guid>
		<description>I would think that IF Mars were to appear to us Earthings as large as the full moon, we&#039;d be in deep doo-doo.  It would mean Mars would have jumped its orbit and a rogue planet might be barrelling toward us.  I imagine the gravitational effects here on the Home Planet might be nearly cataclysmic.</description>
		<content:encoded><![CDATA[<p>I would think that IF Mars were to appear to us Earthings as large as the full moon, we&#8217;d be in deep doo-doo.  It would mean Mars would have jumped its orbit and a rogue planet might be barrelling toward us.  I imagine the gravitational effects here on the Home Planet might be nearly cataclysmic.</p>
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		<title>By: MyronJames</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-202415</link>
		<dc:creator>MyronJames</dc:creator>
		<pubDate>Wed, 29 Jul 2009 14:54:59 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-202415</guid>
		<description>I can&#039;t believe I got sucked into this. I&#039;m usually the guy in my circle of friends that tells them that what they just sent me is BS. For some reason I didn&#039;t bother to check this out, though in the back of my mind I was wondering how much larger Mars was than the Moon.  Duh!!!</description>
		<content:encoded><![CDATA[<p>I can&#8217;t believe I got sucked into this. I&#8217;m usually the guy in my circle of friends that tells them that what they just sent me is BS. For some reason I didn&#8217;t bother to check this out, though in the back of my mind I was wondering how much larger Mars was than the Moon.  Duh!!!</p>
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		<title>By: Wait Long Enough And Planets Might Collide With&#160;Earth &#124; Distant Target</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-190746</link>
		<dc:creator>Wait Long Enough And Planets Might Collide With&#160;Earth &#124; Distant Target</dc:creator>
		<pubDate>Wed, 10 Jun 2009 20:29:03 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-190746</guid>
		<description>[...] strange little hoax about Mars seems to pop up about this time every year. Propagated via email, it claims Mars will approach [...]</description>
		<content:encoded><![CDATA[<p>[...] strange little hoax about Mars seems to pop up about this time every year. Propagated via email, it claims Mars will approach [...]</p>
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		<title>By: heather</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-190356</link>
		<dc:creator>heather</dc:creator>
		<pubDate>Tue, 09 Jun 2009 23:04:56 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-190356</guid>
		<description>Oh the sad day for a science teacher when one of her students came up to share this little &quot;gem&quot;, and what glee he had for going home and telling his mum she was wrong.</description>
		<content:encoded><![CDATA[<p>Oh the sad day for a science teacher when one of her students came up to share this little &#8220;gem&#8221;, and what glee he had for going home and telling his mum she was wrong.</p>
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		<title>By: Martian Bust &#171; One Astronomer&#8217;s Noise</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189623</link>
		<dc:creator>Martian Bust &#171; One Astronomer&#8217;s Noise</dc:creator>
		<pubDate>Mon, 08 Jun 2009 00:06:24 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189623</guid>
		<description>[...] 7, 2009 by Nicole    The Bad Astronomer once again says, &#8220;Mars. Moon. No.&#8220;  Once again, the junk chain email traffic going &#8217;round the internets includes the [...]</description>
		<content:encoded><![CDATA[<p>[...] 7, 2009 by Nicole    The Bad Astronomer once again says, &#8220;Mars. Moon. No.&#8220;  Once again, the junk chain email traffic going &#8217;round the internets includes the [...]</p>
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		<title>By: John</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189537</link>
		<dc:creator>John</dc:creator>
		<pubDate>Sun, 07 Jun 2009 07:53:55 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189537</guid>
		<description>@Sophia8

Ah well..no poets amongst us :-)

John</description>
		<content:encoded><![CDATA[<p>@Sophia8</p>
<p>Ah well..no poets amongst us <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> </p>
<p>John</p>
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		<title>By: Rodney</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189411</link>
		<dc:creator>Rodney</dc:creator>
		<pubDate>Sat, 06 Jun 2009 14:52:53 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189411</guid>
		<description>Yeah,

    I&#039;m always the guy who hits &quot;reply to all&quot; for the &quot;Mars as big as the Moon&quot; E-mails.  My advice, if you ever see that run! (I don&#039;t know where but run...not that it&#039;ll help it&#039;s just the spirit of the thing...)

  

         rod

BTW: STILL can&#039;t find Mars with my Binos but I&quot;m not giving up.</description>
		<content:encoded><![CDATA[<p>Yeah,</p>
<p>    I&#8217;m always the guy who hits &#8220;reply to all&#8221; for the &#8220;Mars as big as the Moon&#8221; E-mails.  My advice, if you ever see that run! (I don&#8217;t know where but run&#8230;not that it&#8217;ll help it&#8217;s just the spirit of the thing&#8230;)</p>
<p>         rod</p>
<p>BTW: STILL can&#8217;t find Mars with my Binos but I&#8221;m not giving up.</p>
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		<title>By: MadScientist</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189264</link>
		<dc:creator>MadScientist</dc:creator>
		<pubDate>Fri, 05 Jun 2009 22:54:22 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189264</guid>
		<description>@Naomi: Good for you.  Most people like to believe their space cult and naturopathy stories.</description>
		<content:encoded><![CDATA[<p>@Naomi: Good for you.  Most people like to believe their space cult and naturopathy stories.</p>
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		<title>By: Mars will NOT be as large in the sky as the Moon &#124; Phoenix Magoo</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189209</link>
		<dc:creator>Mars will NOT be as large in the sky as the Moon &#124; Phoenix Magoo</dc:creator>
		<pubDate>Fri, 05 Jun 2009 20:56:58 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189209</guid>
		<description>[...] For more info check out the Bad Astronomy Blog [...]</description>
		<content:encoded><![CDATA[<p>[...] For more info check out the Bad Astronomy Blog [...]</p>
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		<title>By: Remelox</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189176</link>
		<dc:creator>Remelox</dc:creator>
		<pubDate>Fri, 05 Jun 2009 19:47:46 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189176</guid>
		<description>My father-in-law sent a copy to me. I am an astronomy research assistant and have taken enough physics, astronomy, and math to feel insulted. I had to remind myself that he either honestly didn&#039;t know it was fake or sent it because he thought it was funny. That worst part, his was dated 2008, so if he thought it was real, he should have thought it odd that he didn&#039;t remember looking up and seeing Mars.</description>
		<content:encoded><![CDATA[<p>My father-in-law sent a copy to me. I am an astronomy research assistant and have taken enough physics, astronomy, and math to feel insulted. I had to remind myself that he either honestly didn&#8217;t know it was fake or sent it because he thought it was funny. That worst part, his was dated 2008, so if he thought it was real, he should have thought it odd that he didn&#8217;t remember looking up and seeing Mars.</p>
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		<title>By: TechyDad</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189079</link>
		<dc:creator>TechyDad</dc:creator>
		<pubDate>Fri, 05 Jun 2009 17:14:26 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189079</guid>
		<description>@Steve,

I had to have the same conversation with my father once about waking up in a bathtub full of ice with your kidney removed.  He insisted he heard about it happening &quot;on the news.&quot;  When pressed, he finally admitted to a friend hearing about it &quot;on the news&quot; and then to his friend e-mailing him the &quot;story.&quot;  He finally broke down and admitted that it was likely an urban legend, but then added &quot;but it probably happened somewhere.&quot;   *face palm*</description>
		<content:encoded><![CDATA[<p>@Steve,</p>
<p>I had to have the same conversation with my father once about waking up in a bathtub full of ice with your kidney removed.  He insisted he heard about it happening &#8220;on the news.&#8221;  When pressed, he finally admitted to a friend hearing about it &#8220;on the news&#8221; and then to his friend e-mailing him the &#8220;story.&#8221;  He finally broke down and admitted that it was likely an urban legend, but then added &#8220;but it probably happened somewhere.&#8221;   *face palm*</p>
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		<title>By: Buffalodavid</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189038</link>
		<dc:creator>Buffalodavid</dc:creator>
		<pubDate>Fri, 05 Jun 2009 15:57:48 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189038</guid>
		<description>While no one has SENT me this email (so far this season) I have been asked by a number of people, when its going to happen.  Two of the people who asked me are the same ones I explained it to LAST YEAR!!!!  

Ignorance is not a crime. It can be cured. Stupidity  just seems to go on forever.</description>
		<content:encoded><![CDATA[<p>While no one has SENT me this email (so far this season) I have been asked by a number of people, when its going to happen.  Two of the people who asked me are the same ones I explained it to LAST YEAR!!!!  </p>
<p>Ignorance is not a crime. It can be cured. Stupidity  just seems to go on forever.</p>
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		<title>By: Larian LeQuella</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189034</link>
		<dc:creator>Larian LeQuella</dc:creator>
		<pubDate>Fri, 05 Jun 2009 15:44:42 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189034</guid>
		<description>@Ken B, I think it may be a luck of the draw.  You can also attempt to email him directly (I&#039;ll leave it to you to find his email though).</description>
		<content:encoded><![CDATA[<p>@Ken B, I think it may be a luck of the draw.  You can also attempt to email him directly (I&#8217;ll leave it to you to find his email though).</p>
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		<title>By: Ken B</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-189013</link>
		<dc:creator>Ken B</dc:creator>
		<pubDate>Fri, 05 Jun 2009 14:24:51 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-189013</guid>
		<description>Of course it will appear as large as a full moon.  They just forgot to mention that the moon in question is Deimos.

P.S.  How does one submit links/suggestions to Phil?  I posted a link to one of the comics in the &quot;Mars as big as the Moon&quot; series in the &quot;How to get NASA funded&quot; thread.</description>
		<content:encoded><![CDATA[<p>Of course it will appear as large as a full moon.  They just forgot to mention that the moon in question is Deimos.</p>
<p>P.S.  How does one submit links/suggestions to Phil?  I posted a link to one of the comics in the &#8220;Mars as big as the Moon&#8221; series in the &#8220;How to get NASA funded&#8221; thread.</p>
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		<title>By: Larian LeQuella</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188988</link>
		<dc:creator>Larian LeQuella</dc:creator>
		<pubDate>Fri, 05 Jun 2009 12:45:37 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188988</guid>
		<description>Ugh, I dorked up post #30...  Forgot the quote marks...  Let&#039;s try again.

&lt;center&gt;&lt;a href=&quot;http://larianlequella.com/blogimages/beliefgraph.bmp&quot; rel=&quot;nofollow&quot;&gt;&lt;img src=&quot;http://larianlequella.com/blogimages/beliefgraph.bmp&quot; alt=&quot;Graph of probability of belief&quot;&gt;&lt;/A&gt;&lt;/center&gt;

Oh, BTW, today is the 43rd anniversary  of the earth making a complete orbit about the sun since the date of my birth.  :)

EDIT TO ADD:  Uh oh, the preview is looking &quot;odd&quot;, did I dork it up again?</description>
		<content:encoded><![CDATA[<p>Ugh, I dorked up post #30&#8230;  Forgot the quote marks&#8230;  Let&#8217;s try again.</p>
<p><center><a href="http://larianlequella.com/blogimages/beliefgraph.bmp" rel="nofollow"><img src="http://larianlequella.com/blogimages/beliefgraph.bmp" alt="Graph of probability of belief"/></a></center></p>
<p>Oh, BTW, today is the 43rd anniversary  of the earth making a complete orbit about the sun since the date of my birth.  <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p>EDIT TO ADD:  Uh oh, the preview is looking &#8220;odd&#8221;, did I dork it up again?</p>
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		<title>By: Naomi</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188984</link>
		<dc:creator>Naomi</dc:creator>
		<pubDate>Fri, 05 Jun 2009 12:05:23 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188984</guid>
		<description>Running a bit late ;) My Mum got an email about this a good month ago. (And had to listen to me ranting about the idiots who keep perpetuating this myth for five-odd minutes.) She also asked me about the 2012 thing yesterday... I am slowly (slowly!) making her more skeptical. Hurrah! (She&#039;s already given up on astrology, and has doubts on homeopathy.)</description>
		<content:encoded><![CDATA[<p>Running a bit late <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' />  My Mum got an email about this a good month ago. (And had to listen to me ranting about the idiots who keep perpetuating this myth for five-odd minutes.) She also asked me about the 2012 thing yesterday&#8230; I am slowly (slowly!) making her more skeptical. Hurrah! (She&#8217;s already given up on astrology, and has doubts on homeopathy.)</p>
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		<title>By: Jens Ayton</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188979</link>
		<dc:creator>Jens Ayton</dc:creator>
		<pubDate>Fri, 05 Jun 2009 11:30:38 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188979</guid>
		<description>I’m with #6: the tags are users pointing out the dumbness of the comic, unfortunately.</description>
		<content:encoded><![CDATA[<p>I’m with #6: the tags are users pointing out the dumbness of the comic, unfortunately.</p>
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		<title>By: John</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188975</link>
		<dc:creator>John</dc:creator>
		<pubDate>Fri, 05 Jun 2009 11:27:15 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188975</guid>
		<description>@sophia8
Couplet it is...and let&#039;s limit it to, say, four couplets. That leaves six lines, six &#039;different&#039; contributions. The poem, must reflect, in the end, Phil&#039;s debunking of &quot;Mars&#039;s big as the Moon&quot;. Hope others will get involved...and thanks Sophia :-) for your contribution.

MARS-MOON NO POEM (so far)

Oh Moon, oh Mars up in the sky
You are both so beautiful to mine eye.


John</description>
		<content:encoded><![CDATA[<p>@sophia8<br />
Couplet it is&#8230;and let&#8217;s limit it to, say, four couplets. That leaves six lines, six &#8216;different&#8217; contributions. The poem, must reflect, in the end, Phil&#8217;s debunking of &#8220;Mars&#8217;s big as the Moon&#8221;. Hope others will get involved&#8230;and thanks Sophia <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  for your contribution.</p>
<p>MARS-MOON NO POEM (so far)</p>
<p>Oh Moon, oh Mars up in the sky<br />
You are both so beautiful to mine eye.</p>
<p>John</p>
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		<title>By: sophia8</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188967</link>
		<dc:creator>sophia8</dc:creator>
		<pubDate>Fri, 05 Jun 2009 09:46:40 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188967</guid>
		<description>Always happy to encourage poetry, but what form?  Doggeral, haiku, couplet, iambic etc?
Anyway, here&#039;s my line, so let&#039;s make it couplet form (2 rhyming lines, followed by 2 different rhyming lines):
&quot;You are both so beautiful to mine eye&quot;</description>
		<content:encoded><![CDATA[<p>Always happy to encourage poetry, but what form?  Doggeral, haiku, couplet, iambic etc?<br />
Anyway, here&#8217;s my line, so let&#8217;s make it couplet form (2 rhyming lines, followed by 2 different rhyming lines):<br />
&#8220;You are both so beautiful to mine eye&#8221;</p>
]]></content:encoded>
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		<title>By: Mang</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188964</link>
		<dc:creator>Mang</dc:creator>
		<pubDate>Fri, 05 Jun 2009 09:04:59 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188964</guid>
		<description>@ Steve #10 - had the same conversation

I also had this one (in the blackout) :

neighbour: what&#039;s that your looking at
me: Mars
neighbour: can&#039;t be, it isn&#039;t big enough
me: yes, it is.  Now where did you hear that nonsense?
neighbour: email
me: it&#039;s not true, that&#039;s as big as it gets
neighbour: really?
me: really, want to see it through my scope
neighbour: sure
...
neighbour: ooo, nice!

I&#039;ve also pointed out the orbits don&#039;t line up every year because a Mars year is a bit less than  2 Earth years.  So this could only happen at best every other year.  

But nothing helps like a visual, so I actually showed this to someone.  Try this:

http://ssd.jpl.nasa.gov/sbdb.cgi?orb=1&amp;sstr=1  

Click the orbits drop downand select in order:  No Orbits, Earth and Mars
Turn off the distance label
Zoom in a bit to get Ceres out of the picture
Set the wayback machine to Aug 27th 2003 (use date or just run it backwards)
Rotate the frame so Earth and Mars are front and centre
Set the interval beside the date to 1 year.
Step forward and back.

Hmm, while in 2009 Earth Mars are on the same side of the Sun they&#039;re nowhere close. And won&#039;t be until 2019, 2036, etc.

Mind you IFF Mars ever came close enough to be as large as the full Moon it would be well inside the stable part of Earth&#039;s Hill Sphere.  And IFF that ever happened .... Dunt Dunt Dah ... call out Bruce Willis and company.

I&#039;d read that the original comparison was made by an astronomer, who must be hiding their head in shame at being so badly misconstrued.  Of course, I read that on the Internet ...

@Dean #32 Pity they picked a year where Saturn&#039;s rings were nearly edge on :(

@Mark#51 Just so you don&#039;t feel left out, please post all your relatives email addresses.  I pretty much guarentee your relatives will be sending you copies of the email before long :)</description>
		<content:encoded><![CDATA[<p>@ Steve #10 &#8211; had the same conversation</p>
<p>I also had this one (in the blackout) :</p>
<p>neighbour: what&#8217;s that your looking at<br />
me: Mars<br />
neighbour: can&#8217;t be, it isn&#8217;t big enough<br />
me: yes, it is.  Now where did you hear that nonsense?<br />
neighbour: email<br />
me: it&#8217;s not true, that&#8217;s as big as it gets<br />
neighbour: really?<br />
me: really, want to see it through my scope<br />
neighbour: sure<br />
&#8230;<br />
neighbour: ooo, nice!</p>
<p>I&#8217;ve also pointed out the orbits don&#8217;t line up every year because a Mars year is a bit less than  2 Earth years.  So this could only happen at best every other year.  </p>
<p>But nothing helps like a visual, so I actually showed this to someone.  Try this:</p>
<p><a href="http://ssd.jpl.nasa.gov/sbdb.cgi?orb=1&#038;sstr=1" rel="nofollow">http://ssd.jpl.nasa.gov/sbdb.cgi?orb=1&#038;sstr=1</a>  </p>
<p>Click the orbits drop downand select in order:  No Orbits, Earth and Mars<br />
Turn off the distance label<br />
Zoom in a bit to get Ceres out of the picture<br />
Set the wayback machine to Aug 27th 2003 (use date or just run it backwards)<br />
Rotate the frame so Earth and Mars are front and centre<br />
Set the interval beside the date to 1 year.<br />
Step forward and back.</p>
<p>Hmm, while in 2009 Earth Mars are on the same side of the Sun they&#8217;re nowhere close. And won&#8217;t be until 2019, 2036, etc.</p>
<p>Mind you IFF Mars ever came close enough to be as large as the full Moon it would be well inside the stable part of Earth&#8217;s Hill Sphere.  And IFF that ever happened &#8230;. Dunt Dunt Dah &#8230; call out Bruce Willis and company.</p>
<p>I&#8217;d read that the original comparison was made by an astronomer, who must be hiding their head in shame at being so badly misconstrued.  Of course, I read that on the Internet &#8230;</p>
<p>@Dean #32 Pity they picked a year where Saturn&#8217;s rings were nearly edge on <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_sad.gif' alt=':(' class='wp-smiley' /> </p>
<p>@Mark#51 Just so you don&#8217;t feel left out, please post all your relatives email addresses.  I pretty much guarentee your relatives will be sending you copies of the email before long <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
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	<item>
		<title>By: John</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188960</link>
		<dc:creator>John</dc:creator>
		<pubDate>Fri, 05 Jun 2009 08:43:47 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188960</guid>
		<description>MARS-MOON NO POEM:
Add the next line below...lets get a poem going -- one line only per contributor with, say, upto ten words :-) My contribution starts below.


         &quot;Oh Moon, oh Mars up in the sky&quot;


John (Author of new Moon Atlas -- more on my name above)</description>
		<content:encoded><![CDATA[<p>MARS-MOON NO POEM:<br />
Add the next line below&#8230;lets get a poem going &#8212; one line only per contributor with, say, upto ten words <img src='http://blogs.discovermagazine.com/badastronomy/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  My contribution starts below.</p>
<p>         &#8220;Oh Moon, oh Mars up in the sky&#8221;</p>
<p>John (Author of new Moon Atlas &#8212; more on my name above)</p>
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	<item>
		<title>By: MadScientist</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188956</link>
		<dc:creator>MadScientist</dc:creator>
		<pubDate>Fri, 05 Jun 2009 07:58:52 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188956</guid>
		<description>[OT] Oh, for t3h g33k out there:  HAPPY BIRTHDAY UNIX!</description>
		<content:encoded><![CDATA[<p>[OT] Oh, for t3h g33k out there:  HAPPY BIRTHDAY UNIX!</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: MarkD</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188953</link>
		<dc:creator>MarkD</dc:creator>
		<pubDate>Fri, 05 Jun 2009 07:29:14 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188953</guid>
		<description>Heck, go with it.

If people are interested in space, go with it! Yes it may be from a terrible source, but if it gets people positive about space exploration and manned missions, I say that&#039;s a good thing. A few more interested people, and a few less saying &quot;Why waste money in space when we have problems on earth, blah blah blah&quot;

Give &#039;em some real facts about Mars: 
Methane coming from the surface that might signal life
Probable hematite pebbles just laying about for mining
Percolate in the soil, ripe for making oxygen or fuel - the same substance Russia used to use for back-up oxygen generators

That&#039;s more interesting than Mars being &quot;Super close&quot;</description>
		<content:encoded><![CDATA[<p>Heck, go with it.</p>
<p>If people are interested in space, go with it! Yes it may be from a terrible source, but if it gets people positive about space exploration and manned missions, I say that&#8217;s a good thing. A few more interested people, and a few less saying &#8220;Why waste money in space when we have problems on earth, blah blah blah&#8221;</p>
<p>Give &#8216;em some real facts about Mars:<br />
Methane coming from the surface that might signal life<br />
Probable hematite pebbles just laying about for mining<br />
Percolate in the soil, ripe for making oxygen or fuel &#8211; the same substance Russia used to use for back-up oxygen generators</p>
<p>That&#8217;s more interesting than Mars being &#8220;Super close&#8221;</p>
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		<title>By: Gray Gaffer</title>
		<link>http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/comment-page-2/#comment-188949</link>
		<dc:creator>Gray Gaffer</dc:creator>
		<pubDate>Fri, 05 Jun 2009 04:44:46 +0000</pubDate>
		<guid isPermaLink="false">http://blogs.discovermagazine.com/badastronomy/2009/06/04/mars-moon-no/#comment-188949</guid>
		<description>A lesson in how the caveats are quickly dropped from a science story in its passage to the public. Yet there was one part of the caveat that was omitted even from the original. Through a 200x eyepiece, mars will appear to subtend 1/2 degree to the observing eyeball. Without a telescope, the moon subtends 1/2 degree to the naked eyeball. In other words, comparing apples and oranges. To the naked eyeball, then, Mars subtends 0.5 / 200 degrees, or about 9 seconds of arc. IOW, a starry dot that just does not twinkle. Much. Mars is a tough subject; 200x is over the typical useful magnification for your typical amateur terrestrial telescope. 150x is pushing it even for an 8&quot; Celestron. Not so much the optics, its the atmosphere. On a really good night I managed 400x, the theoretical max for 8&quot; aperture (50x per 1&quot; aperture is the heuristic. More than that and you are just looking at bigger fuzzy blobs).</description>
		<content:encoded><![CDATA[<p>A lesson in how the caveats are quickly dropped from a science story in its passage to the public. Yet there was one part of the caveat that was omitted even from the original. Through a 200x eyepiece, mars will appear to subtend 1/2 degree to the observing eyeball. Without a telescope, the moon subtends 1/2 degree to the naked eyeball. In other words, comparing apples and oranges. To the naked eyeball, then, Mars subtends 0.5 / 200 degrees, or about 9 seconds of arc. IOW, a starry dot that just does not twinkle. Much. Mars is a tough subject; 200x is over the typical useful magnification for your typical amateur terrestrial telescope. 150x is pushing it even for an 8&#8243; Celestron. Not so much the optics, its the atmosphere. On a really good night I managed 400x, the theoretical max for 8&#8243; aperture (50x per 1&#8243; aperture is the heuristic. More than that and you are just looking at bigger fuzzy blobs).</p>
]]></content:encoded>
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