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13 March 2014 11:08 am ,
Vol. 343 ,
In the shadow of the crisis in Crimea, Ukrainian legislators are weighing a pair of science and education bills that...
Researchers dependent on government funding would face a flat future under the White House's $3.9 trillion budget...
Reservoirs of cells that harbor HIV DNA woven into human chromosomes have become the bane of researchers trying to cure...
Geochemists have now incorporated in their models some details of the way naturally acidic rainwater dissolves rock...
Schizophrenia is a devastating mental disorder that afflicts about 1% of the world's population at one time or another...
Surface tension is a force to be reckoned with, especially if you are small. It enables a water strider to skate along...
- 13 March 2014 11:08 am , Vol. 343 , #6176
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ScienceShot: Stars in Cluster Buzzing Past Their Youth
3 June 2010 2:34 pm
Just like aging hippies, the stars in cluster NGC 3603 won't settle down, astronomers found when they compared images of the cluster taken by the Hubble Space Telescope's Wide Field and Planetary Camera 2 in 2007 with images taken 10 years earlier. NGC 3603, located about 20,000 light-years away in the southern constellation Carina, formed from a giant cloud of gas and dust about 1 million years ago. The full cluster is teeming, with 10,000 stars packed in an area of about 3 light-years square--less than the distance between the sun and its nearest neighbor, Proxima Centauri. Despite the crowding, astronomers had expected NGC 3603's constituent stars to have slowed to a relatively leisurely pace within the cluster. Eventually, they thought, the cluster would settle into a spherical and stable globular cluster. Instead, they report in The Astrophysical Journal Letters, the stars are moving around over twice as fast as expected. Their analyses suggest that astronomers still have some refining to do in their models of how such clusters evolve.