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10 April 2014 11:44 am ,
Vol. 344 ,
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
- 10 April 2014 11:44 am , Vol. 344 , #6180
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ScienceShot: You Are Here; A Black Hole Is There
8 August 2012 2:45 pm
Researchers today released the largest three-dimensional map of black holes and massive galaxies yet produced, which pinpoints the locations and distances to more than 1 million galaxies. Most of those galaxies, each of which contains more than 100 billion stars, lie between 1 billion and 6 billion light-years from Earth. Mapping them will enable scientists to retrace the history of the universe for the last 6 billion years, the team says, thereby allowing astronomers to make better estimates for how much of it is composed of the "dark matter" that can’t be directly seen, and "dark energy," the mysterious force that’s driving the expansion of the universe. The survey, which recently completed its second year, has so far covered about 8% of the sky. By the time the 6-year project is completed, researchers will have mapped all massive galaxies outside of the dust-clogged plane of our Milky Way galaxy that are visible from the Northern Hemisphere—altogether, about one-fourth of the sky that’s visible from Earth.
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