venus jupiter and moon!

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beanbag

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i love to see this beautiful sight we as humans are all getting to see right now. that is, the moon and venus and jupiter all together! well, the moon has moved further upwards now and is not really near those planets. the other night, i was looking at how close venus and jupiter were. jupiter was directly above venus. 2 night later, jupiter was no longer directly above venus but was actually quite right of venus. i thought stars were fixed in the sky. how did these 2 planets in view to earth move so much in only 2 nights? <div class="Discussion_UserSignature"> <p><strong><font size="3" color="#800080">janet.  </font></strong></p><p><font size="2">greater love hath no dude than this, that he may lay down his life for his rodent.</font></p> </div>
 
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MeteorWayne

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Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>i love to see this beautiful sight we as humans are all getting to see right now. that is, the moon and venus and jupiter all together! well, the moon has moved further upwards now and is not really near those planets. the other night, i was looking at how close venus and jupiter were. jupiter was directly above venus. 2 night later, jupiter was no longer directly above venus but was actually quite right of venus. i thought stars were fixed in the sky. how did these 2 planets in view to earth move so much in only 2 nights? <br />Posted by beanbag</DIV><br /><br />Stars are fixed in the sky, planets are not. Venus actually moves quite rapidly, since it is closer to the sun than we are. That means it moves faster in it's orbit. Jupiter moves much more slowly among the background stars, since it takes 12 years to orbit the sun. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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emperor_of_localgroup

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Stars are fixed in the sky, planets are not. Venus actually moves quite rapidly, since it is closer to the sun than we are. That means it moves faster in it's orbit. Jupiter moves much more slowly among the background stars, since it takes 12 years to orbit the sun. <br />Posted by MeteorWayne</DIV></p><p><font size="2">Glad someone started a thread on this. Last few nights I have been looking at the brightest object(s) in&nbsp; night sky&nbsp; through my 'refractor' and wondering what are they? What happened to Jupiters moons? Why only 2, what happened to other moons? Or was I looking at Venus? But venus doesn't have moons. All I see is 3 dots in a straight line, the middle one is the planet. </font></p><p><font size="2">Btw, I'm a beginner with telescopes.</font></p><p>&nbsp;</p> <div class="Discussion_UserSignature"> <font size="2" color="#ff0000"><strong>Earth is Boring</strong></font> </div>
 
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MeteorWayne

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Glad someone started a thread on this. Last few nights I have been looking at the brightest object(s) in&nbsp; night sky&nbsp; through my 'refractor' and wondering what are they? What happened to Jupiters moons? Why only 2, what happened to other moons? Or was I looking at Venus? But venus doesn't have moons. All I see is 3 dots in a straight line, the middle one is the planet. Btw, I'm a beginner with telescopes.&nbsp; <br />Posted by emperor_of_localgroup</DIV><br /><br />The moons orbit around the planet. At times they are behind (impossible to see) or in front (very difficult to see in a small scope).</p><p>When Jupiter is placed higher in the night sky, so you can watch for a few hours, you can actually notice the motion of the inner moons in the course of a night. You can also watch moons go into eclipse (move into Jupiter's shadow), and sometimes even see a moon's shadow on Jupiters surface (again, you need a decent sized scope for that).</p><p>Unfortunately, at this time, Jupiter sets so soon after sunset there's not much time to look for the motion.</p><p>The eclipse events may be visible, I'll see if any are upcoming.</p><p>The shadow of the moon on the surface will probably require a larger scope than what you have.</p><p>MW</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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MeteorWayne

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<p>&nbsp;</p><p>Here's a Jovian Moon Transit event. There's a lot of these in the Astrophotography Forum.</p><p>Jupiter Transit</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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CalliArcale

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I am jealous of our European members.&nbsp; From Europe, Venus was actually observed to pass *behind* the Moon!&nbsp; Such an event is called an "occultation", and is generally only visible from part of the planet (much like a solar eclipse). <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em>  -- The Tenth Doctor, "Blink"</font></p> </div>
 
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adrenalynn

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<p>I'm going to drop this here too since it's on-topic and I assume no one will object...</p><p>&nbsp;This was shot <strong>handheld </strong>with dead batteries.&nbsp; I cracked off exactly one frame and one frame only before it died.&nbsp; Handheld at 300mm, ISO 1600, just after dusk, 1/20th Sec f/4</p><p><br /><img src="http://sitelife.space.com/ver1.0/Content/images/store/10/11/7ad1e495-018f-46ec-9b56-6949791e398b.Medium.jpg" alt="" /></p><p>11/30/2008 @ 17:21 PST, Sacramento CA area.</p><p>[Pluck can't even thumbnail into a full-size photo.&nbsp; Sigh.&nbsp; Here it is at a reasonable size: <font color="#5574b9">http://www.jlrdesigns.com/mvj.jpg</font>&nbsp;]</p> <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font>  (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.]  Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>
 
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andydyer

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I was flying from New York to SC last night, 12/22.&nbsp; At around 8:30PM, in the South to Southwest sky...very low on the horizon...we observed a large "star" that would intermittantly turn from red to bright red...and actually "appear" to get larger as the color intensified. I am not an astronomer, amature or otherwise, and wonder if someone could explain what we were seeing.
 
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adrenalynn

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<p>Hi Andy, sure!&nbsp; That's probably the number one question I see here.</p><p>At the simplest, you'll see "twinkle twinkle little star" because of atmospheric turbulence.&nbsp; As the air churns the light from the star is refracted in different directions.&nbsp; The star will appear to change color, brightness, size, and even position.</p><p>&nbsp;The lower in the sky the star is, the more pronounced the effect will be.</p><p>As the light passes through this "fouled lens", different wavelengths will get refracted in different directions, like a flawed prism&nbsp;- hence the color change.</p><p>As an aside, I'd guess the star you were observing was Sirius.&nbsp; It's an extremely bright star and was very low on the horizon at the time.</p><p>I have videos of the effect on YouTube for Capella and Arcturus...&nbsp; http://www.youtube.com/user/alynn333333</p><p>&nbsp;</p><p>P.S. I think Sirius would have been more in your SE sky rather than SW sky - but it would have been the only *really* bright star over there.&nbsp; It's a ~-1.5mag where the other stars I'd expect to see low on the horizon are probably around 2mag.</p> <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font>  (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.]  Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>
 
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andydyer

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Hi Andy, sure!&nbsp; That's probably the number one question I see here.At the simplest, you'll see "twinkle twinkle little star" because of atmospheric turbulence.&nbsp; As the air churns the light from the star is refracted in different directions.&nbsp; The star will appear to change color, brightness, size, and even position.&nbsp;The lower in the sky the star is, the more pronounced the effect will be.As the light passes through this "fouled lens", different wavelengths will get refracted in different directions, like a flawed prism&nbsp;- hence the color change.As an aside, I'd guess the star you were observing was Sirius.&nbsp; It's an extremely bright star and was very low on the horizon at the time.I have videos of the effect on YouTube for Capella and Arcturus...&nbsp; http://www.youtube.com/user/alynn333333P.S. I think Sirius would have been more in your SE sky rather than SW sky - but it would have been the only *really* bright star over there.&nbsp; It's a ~-1.5mag where the other stars I'd expect to see low on the horizon are probably around 2mag. <br />Posted by adrenalynn</DIV><br /><br />It was definately in the southwest...I kind of wondered if we could have been observing Jupiter from what I have read hear and outher places....</p><p>&nbsp;Regardless, thanks for the quick reply!!!</p>
 
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adrenalynn

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<p>The rule of thumb - if it twinkles, it's not a planet.</p><p>&nbsp;Let me pull up an almanac and see if I can figure out what you were looking at at the time.&nbsp; </p><p>You said ~8:30PM on the 22nd, but I'm going to assume you meant the 21st - and that the 8:40pm [20] was Eastern Standard Time (EST), right?</p> <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font>  (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.]  Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>
 
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MeteorWayne

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Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>It was definately in the southwest...I kind of wondered if we could have been observing Jupiter from what I have read hear and outher places....&nbsp;Regardless, thanks for the quick reply!!! <br />Posted by andydyer</DIV><br /><br />Well, Venus is by<strong> far</strong> the brightest object in that part of the sky (In fact, it's the 3rd brightest object in the sky after the sun and moon). It would be somewhat unusual that it would be twinkling, but with the large temperature contrast at this time of year, it's certainly not imposssible <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>
 
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crazyeddie

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I'm going to drop this here too since it's on-topic and I assume no one will object...&nbsp;This was shot handheld with dead batteries.&nbsp; I cracked off exactly one frame and one frame only before it died.&nbsp; Handheld at 300mm, ISO 1600, just after dusk, 1/20th Sec f/411/30/2008 @ 17:21 PST, Sacramento CA area.[Pluck can't even thumbnail into a full-size photo.&nbsp; Sigh.&nbsp; Here it is at a reasonable size: http://www.jlrdesigns.com/mvj.jpg&nbsp;] <br /> Posted by adrenalynn</DIV></p><p>It looked like a smiley face in the sky:</p><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/13/8/6d63fa5e-c994-4e8c-a81e-6f3400db89ef.Medium.jpg" alt="" /><br /><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>
 
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adrenalynn

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Wish I'd had a chance to get up into the foothills and shoot off towards the city.&nbsp; Would have been awesome.&nbsp; Even the opportunity to bracket more than one frame wouldn't have sucked. ;) <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font>  (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.]  Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>
 
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3488

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<p><font size="2"><strong>A couple of nice conjunctions coming up @ the end of this month.</strong></font></p><p><font size="2"><strong>Jupiter & Mercury <strong>are </strong>very close to the Moon, very low in the southwest after sunset. They are above the Moon on Sunday 28th December 2008 (with Mercury closest to the Moon) & to the lower right on Monday 29th December 2008.</strong></font> </p><p><font size="2"><strong><span class="bigheadline">Tuesday 30th & Wednesday 31st December 2008,</span> Venus is well to the upper left of the Moon on the evening of the 30th, but quite close to the Moon's lower left on the year's last night. Mercury puts on a reasonably good show into 2009, although very low down, but will be better the further south you are.</strong></font></p><p><font size="2"><strong>Andrew Brown.&nbsp;</strong></font></p> <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>
 
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