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Monday, April 06, 2009

April yet?

Free Hubble wallpapers!
http://hubblesite.org/gallery/wallpaper/

The above image is an amazing composite shot which captures all of the stages of a celestial star's life.
Here's the info from HubbleSite.

In this stunning picture of the giant galactic nebula NGC 3603, the crisp resolution of NASA's Hubble Space Telescope captures various stages of the life cycle of stars in one single view.

To the upper right of center is the evolved blue supergiant called Sher 25. The star has a unique circumstellar ring of glowing gas that is a galactic twin to the famous ring around the supernova 1987A. The grayish-bluish color of the ring and the bipolar outflows (blobs to the upper right and lower left of the star) indicates the presence of processed (chemically enriched) material.

Near the center of the view is a so-called starburst cluster dominated by young, hot Wolf-Rayet stars and early O-type stars. A torrent of ionizing radiation and fast stellar winds from these massive stars has blown a large cavity around the cluster.

The most spectacular evidence for the interaction of ionizing radiation with cold molecular-hydrogen cloud material are the giant gaseous pillars to the right and lower left of the cluster. These pillars are sculptured by the same physical processes as the famous pillars Hubble photographed in the M16 Eagle Nebula.

Dark clouds at the upper right are so-called Bok globules, which are probably in an earlier stage of star formation.

To the lower left of the cluster are two compact, tadpole-shaped emission nebulae. Similar structures were found by Hubble in Orion, and have been interpreted as gas and dust evaporation from possibly protoplanetary disks (proplyds). The "proplyds" in NGC 3603 are 5 to 10 times larger in size and correspondingly also more massive.

This single view nicely illustrates the entire stellar life cycle of stars, starting with the Bok globules and giant gaseous pillars, followed by circumstellar disks, and progressing to evolved massive stars in the young starburst cluster. The blue supergiant with its ring and bipolar outflow marks the end of the life cycle.

The color difference between the supergiant's bipolar outflow and the diffuse interstellar medium in the giant nebula dramatically visualizes the enrichment in heavy elements due to synthesis of heavier elements within stars.

This true-color picture was taken on March 5, 1999 with the Wide Field Planetary Camera 2.

This picture is being presented at the 194th Meeting of the American Astronomical Society in Chicago.

Object Names: NGC 3603, Sher 25

Image Type: Astronomical

Credit: Wolfgang Brandner (JPL/IPAC), Eva K. Grebel (Univ. Washington), You-Hua Chu (Univ. Illinois Urbana-Champaign), and NASA

April showers are yet to come but they seem to be on their way. Got tax stuff done, what a pain.

While I wasn't paying attention to this blog, Google's RSS feed of this blog had given some strange hiccups. There was a one line post which said 'eeyore is cute' and dated April 3rd -- probably spawned then pinged google's RSS feed during a browser crash, mystery to me... and I don't even remember typing to the blogger database that day. Then there was an old post from last year that reposted itself the following day... it's still an old post. Annoying. Anyway, back to normal I hope. At least with taxes over, I can unwind and try to catch up with things.

Some fun. :)
Geno sent a few blackberry pics of Helmut sitting under a tree on a mound of snow. I wanted to snuggle! I put the pics on Facebook and you can see them there--from a side panel on the left column that goes to the facebook album.

I was playing with the somewhat grainy and darkish headshots of those two pics and came up with this digital painting below. Was fun to do, need more time and more practice. :)

Helmut

Isn't he handsome?

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Semavi Lady woofed at @ 4/06/2009 04:37:00 AM | Permanent link | (0) Comments

Puppy Boone says: Let's chat!

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