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LEDA 1852: a lonely galaxy inside a cosmic void!



 
 
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  #1  
Old November 10th 15, 08:59 AM posted to sci.astro
Yousuf Khan[_2_]
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Default LEDA 1852: a lonely galaxy inside a cosmic void!

There are huge expanses of space with very little matter in them. You'll
find maybe 1 galaxy in the entire lonely stretch of them. One such
galaxy has been imaged by Hubble.

NASA’s Hubble Space Telescope Focuses on Lonely Galaxy | Astronomy |
Sci-News.com
http://www.sci-news.com/astronomy/sc...axy-03417.html
  #2  
Old November 10th 15, 03:56 PM posted to sci.astro
dlzc
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Default LEDA 1852: a lonely galaxy inside a cosmic void!

Dear Yousuf Khan:

On Tuesday, November 10, 2015 at 12:59:50 AM UTC-7, Yousuf Khan wrote:
There are huge expanses of space with very little
matter in them. You'll find maybe 1 galaxy in the
entire lonely stretch of them. One such galaxy has
been imaged by Hubble.


We survey "void spaces", and we get back the spectrum of stars. We see the "missing normal matter" across these void spaces, ionized hydrogen and oxygen missing 5 electrons (so 25 million degrees or so).

So they may be huge expanses where there are not the dust clouds (like flying glass and bumper bits of collisions) that allow us to image them, but it is not really correct to say they are empty or even have "very little matter". It is only true to say there are no hot, visible galaxies in them.

Good article though, thanks.

David A. Smith
 




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