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Astronomy Picture of the Day
NASA ^ | 8/22/09 | Axel Mellinger

Posted on 08/22/2009 6:09:01 AM PDT by sig226


The Gum Nebula
Credit & Copyright:
Axel Mellinger

Explanation: Named for Australian astronomer Colin Stanley Gum (1924-1960), The Gum Nebula is so large and close it is actually hard to see. In fact, we are only about 450 light-years from the front edge and 1,500 light-years from the back edge of this cosmic cloud of glowing hydrogen gas. Covered in this 41 degree-wide mosaic of H-alpha images, the faint emission region is otherwise easy to lose against the background of Milky Way stars. The complex nebula is thought to be a supernova remnant over a million years old, sprawling across the southern constellations Vela and Puppis. Sliding your cursor over this spectacular wide field view will reveal the location of objects embedded in The Gum Nebula, including the Vela supernova remnant.


TOPICS: Astronomy Picture of the Day
KEYWORDS: apod; falsecolor

1 posted on 08/22/2009 6:09:01 AM PDT by sig226
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To: fnord; Number57; KevinDavis; rdb3; MNJohnnie; RightWhale; proudofthesouth; hattend; ...

2 posted on 08/22/2009 6:09:38 AM PDT by sig226 (Real power is not the ability to destroy an enemy. It is the willingness to do it.)
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To: All; sig226
"The Gum Nebula is so large and close it is actually hard to see. In fact, we are only about 450 light-years from the front edge and 1,500 light-years from the back edge of this cosmic cloud of glowing hydrogen gas."

"so close" meaning 450 multiplied by approximately 5.9 TRILLION (miles), as ONE light-year, the distance light travels in one year at its constant speed of 186,000 miles per second, works out to about 5.9 trillion miles.

Also, at approximately 100,000 light years in diameter, this cloud of gas is about as wide as our Milky Way galaxy! The MWG is believed to contain somewhere between 200 and 400 BILLION stars.

3 posted on 08/22/2009 6:29:03 AM PDT by ETL (ALL the Obama-commie connections at my FR Home page: http://www.freerepublic.com/~etl/)
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To: sig226

Dancing in the stars. Fred (Gum 14), Ginger (Gum 17)? Is that you?

Neat image at the link.


4 posted on 08/22/2009 6:44:55 AM PDT by TheOldLady
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To: sig226
The Kermit Nebula!


5 posted on 08/22/2009 7:43:16 AM PDT by Young Werther (Julius Caesar (Quae Cum Ita Sunt. Since these things are so.))
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To: Young Werther
Does your chewing gum lose its flavor
In the Cosmos overnight
If your mother says don't chew it
Do you swallow it in spite
Can you catch it on your tonsils
Can you heave it left and right
Does your chewing gum lose its flavor
In the Cosmos overnight

6 posted on 08/22/2009 8:58:30 AM PDT by null and void (We are now in day 212 of our national holiday from reality. - 0bama really isn't one of US.)
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To: sig226

Now, THAT is “Oooooooooh! Aaaaaaaaahh!”


7 posted on 08/22/2009 9:56:51 AM PDT by redhead (If it's worth fighting for, it's worth dying for. Check the Halfbaked Sourdough)
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To: ETL

Miles to dollars it at that far, so i’m told.


8 posted on 08/22/2009 2:17:09 PM PDT by mowowie
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To: ETL

How can a nebula within our galaxy be as wide as our galaxy?
A Supernova can spew it’s stuff that far and light it?


9 posted on 08/22/2009 2:23:09 PM PDT by mowowie
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To: mowowie
How can a nebula within our galaxy be as wide as our galaxy?

You're right. I misread the description. Somehow I thought the "450" was 450,000. Our Milky Way galaxy is believed to be about 100,000 light years in diameter.

"The Gum Nebula is so large and close it is actually hard to see. In fact, we are only about 450 light-years from the front edge and 1,500 light-years from the back edge of this cosmic cloud of glowing hydrogen gas."

http://antwrp.gsfc.nasa.gov/apod/ap090822.html

10 posted on 08/22/2009 2:38:04 PM PDT by ETL (ALL the Obama-commie connections at my FR Home page: http://www.freerepublic.com/~etl/)
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To: mowowie
How can a nebula within our galaxy be as wide as our galaxy?

Actually, re-reading my earlier post, I see that the problem was that I mistakenly stated that the gas cloud was 100,000 light years in diameter when it was only 1,000.

From the article:

"The Gum Nebula is so large and close it is actually hard to see. In fact, we are only about 450 light-years from the front edge and 1,500 light-years from the back edge of this cosmic cloud of glowing hydrogen gas."

http://antwrp.gsfc.nasa.gov/apod/ap090822.html

11 posted on 08/22/2009 2:43:59 PM PDT by ETL (ALL the Obama-commie connections at my FR Home page: http://www.freerepublic.com/~etl/)
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