• July 2010
    M T W T F S S
    « Jun   Aug »
     1234
    567891011
    12131415161718
    19202122232425
    262728293031  
  • Top Posts

  • Categories

  • feedburner

  • Follow me on Twitter

Space photo of the day. July 8, 2010. A group of galaxies.


See Explanation.  Clicking on the picture will download  the highest resolution version available.

Those swirls are galaxies. Not planets, not stars,
not solar systems.  Galaxies. Wow!

HCG 87: A Small Group of Galaxies
Credit: Sally Hunsberger (Lowell Obs.), Jane Charlton (Penn State) et al.;
Data: Hubble Legacy Archive; Processing: Robert Gendler

Explanation: Sometimes galaxies form groups. For example, our own Milky Way Galaxy is part of the Local Group of Galaxies. Small, compact groups, like Hickson Compact Group 87 (HCG 87) shown above, are interesting partly because they slowly self-destruct. Indeed, the galaxies of HCG 87 are gravitationally stretching each other during their 100-million year orbits around a common center. The pulling creates colliding gas that causes bright bursts of star formation and feeds matter into their active galaxy centers. HCG 87 is composed of a large edge-on spiral galaxy visible on the lower left, an elliptical galaxy visible on the lower right, and a spiral galaxy visible near the top. The small spiral near the center might be far in the distance. Several stars from our Galaxy are also visible in the foreground. The above picture was taken in 1999 July by the Hubble Space Telescope‘s Wide Field Planetary Camera 2. Studying groups like HCG 87 allows insight into how all galaxies form and evolve.

From http://antwrp.gsfc.nasa.gov/apod/ap100706.html

Advertisements

5 Responses

  1. Space photo of the day. July 8, 2010. A group of galaxies. « Life ……

    I found your entry interesting do I’ve added a Trackback to it on my weblog :)…

  2. The Hubble photographs are so extraordinary. They help me realize how small my little worries are when you consider the vast universe.

  3. Nah. Your worries are not small, it’s just that there are a lot more places to have them than we ever knew.

  4. I love the space photos . . . so amazingly infinite!

Comments are closed.

%d bloggers like this: