News of the WeekDARK MATTER

Astronomers Glimpse Galaxy's Heavy Halo

Science  23 Mar 2001:
Vol. 291, Issue 5512, pp. 2293-2294
DOI: 10.1126/science.291.5512.2293a

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Summary

In a paper published online today by Science (www.sciencexpress.org), an international team of astronomers claims to have directly spotted the source of at least 3% of all the dark matter in the galaxy: They have identified large numbers of fast-moving white dwarf stars that formed when the Milky Way first flickered to life several billion years ago. And that is just a cautious lower limit.

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