News tagged with black holes

Gaia science alerts are back

While scanning the sky to measure the position and velocity of a billion stars, ESA's Gaia satellite also records many 'guest stars' – astronomical sources that, for a short period of time, are much brighter than usual.

dateMar 08, 2016 in Astronomy
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The Milky Way's central molecular zone

The center of our Milky Way galaxy lies about 27,000 light-years away in the direction of the constellation of Sagittarius. At its core is a black hole about four million solar masses in size. Around the black hole is a donut-shaped ...

dateFeb 29, 2016 in Astronomy
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