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27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
Until recently, the Defense Advanced Research Projects Agency (DARPA) kept its plans for its $70 million portion of the...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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ScienceShot: Mystery Rings Spied Around Elderly Galaxies
11 August 2010 3:55 pm
Meet the real Lords of the Rings. These images, released today, show four of more than 20 highly unusual galaxies spied recently by NASA's Galaxy Evolution Explorer spacecraft, with follow-up observations by the Hubble Space Telescope. The galaxies, averaging about 10 billion years in age, are so old that standard theory dictates they can no longer spawn many new stars. But the rings, visible only in ultraviolet light (blue), say otherwise. They're so big—each would easily encircle the Milky Way—and energetic that astronomers say they must be the byproducts of enormous bursts of starmaking. Thus far, the only plausible explanation is that the galaxies in question must have somehow siphoned off enough gas from the intergalactic medium to spark the renewed activity. But such a phenomenon has never been observed before, so the rings will require more detailed study.
See more ScienceShots.