Topic: Black hole

Black Hole Chokes on a Swallowed Star

Jan. 27, 2015

A five-year analysis of an event captured by a tiny telescope at McDonald Observatory and followed up by telescopes on the ground and in space has led astronomers to believe they witnessed a giant black hole tear apart a star.

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Massive Black Hole Devours Headlines

Dec. 3, 2012
Massive Black Hole Devours Headlines

Astrophysicist Karl Gebhardt made international headlines in late November with the discovery of the largest black hole in the universe, a behemoth that's 17 billion times heavier than the Sun.

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Texas Astronomers Measure Most Massive, Most Unusual Black Hole Using Hobby-Eberly Telescope

Nov. 28, 2012

Astronomers have used the Hobby-Eberly Telescope at The University of Texas at Austin's McDonald Observatory to measure the mass of what may be the most massive black hole yet 17 billion times our sun's mass in galaxy NGC 1277. The unusual black hole makes up 14 percent of its galaxy's mass, rather than the usual 0.1 percent.

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Pair of Black Holes 'Weigh In' at 10 Billion Suns, the Most Massive Yet

Dec. 5, 2011

A team of astronomers including Karl Gebhardt and graduate student Jeremy Murphy of The University of Texas at Austin have discovered the most massive black holes to date two monsters weighing as much as 10 billion suns and threatening to consume anything, even light, within a region five times the size of our solar system.

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Black holes and starry skies

May 12, 2011
Black holes and starry skies

How do you measure a black hole? In this video Astronomy Professor Karl Gebhardt weighs in on the cosmic matter.

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