News tagged with massive galaxy

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Diagnosing a black hole flare

(Phys.org) -- Black holes can come in a wide range of masses. Some, with only about one solar mass, result from the supernova death of a massive star, while those at the center of galaxies (called supermassive ...

May 07, 2012 5 / 5 (4) 0 | with audio podcast

Old star, new trick

The Big Bang produced lots of hydrogen and helium and a smidgen of lithium. All heavier elements found on the periodic table have been produced by stars over the last 13.7 billion years. Astronomers analyze starlight to determine ...

Apr 30, 2012 5 / 5 (10) 30 | with audio podcast

Ultra-luminous x-ray sources

(PhysOrg.com) -- An ultra-luminous X-ray source (ULX) emits more radiation in the X-rays than do a million suns at all wavelengths. ULXs are rare: Most galaxies, including our own Milky Way, have none, and ...

Mar 19, 2012 5 / 5 (7) 1 | with audio podcast

The central region of the Milky Way

(PhysOrg.com) -- The center of our Milky Way galaxy is about 27,000 light-years away in the direction of the constellation of Sagittarius. At the very center of the galaxy lies a black hole whose mass is about ...

Aug 15, 2011 4.7 / 5 (22) 19 | with audio podcast

A star is torn

A University of Sydney researcher was part of an international team of astronomers that has observed an incredibly rare event that occurs once every 10,000 years per galaxy.

Aug 08, 2011 4.6 / 5 (21) 1 | with audio podcast