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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Milky Way Blows a Huge Bubble
10 January 2013 2:40 pm
LONG BEACH, CALIFORNIA—The circular structure in this infrared image from NASA's Spitzer Space Telescope is the largest hot-hydrogen bubble in our Milky Way galaxy. Measuring 300 light-years across, the bubble, known as G52L, is filled with hydrogen gas that is ionized by the energetic radiation of embedded young stars. In the dusty nebulae around the bubble's rim, the formation of new stars is being stimulated. The giant bubble is one of dozens of similar HII regions (HII is ionized hydrogen) first detected with the 110-meter Robert C. Byrd Green Bank Telescope in West Virginia. The Green Bank Telescope HII Region Discovery Survey, the first results of which were presented here on Wednesday at the 221st meeting of the American Astronomical Society, will provide astronomers with a detailed map of the spiral structure of the Milky Way.
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