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Astronomers find runaway galaxies

25 April 2015 Astronomy Now

Researchers mining data from Virtual Observatory archives found 11 previously unknown compact elliptical galaxies that were isolated from from any galaxy cluster, flung out of their homes at speeds up to 6 million miles per hour to wander the void of intergalactic space.

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Cosmic tsunami wakes up comatose galaxies

24 April 2015 Astronomy Now

An international team of astronomers have discovered sleeping galaxies that stopped forming stars in the distant past can be rejuvinated when clusters of galaxies merge, generating a cosmic shock wave that triggers the birth of a new generation of stars.

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Binary black holes found verging on merging

22 April 2015 Keith Cooper

Twin black holes, so close that they are gravitationally bound and orbiting around one another in the final stages before they merge to form one colossal black hole, have been found in a quasar that existed around 10.3 billion years ago.

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A cold cosmic mystery solved

20 April 2015 Astronomy Now

Since its discovery over a decade ago on a map of the cosmic background radiation left over from the Big Bang, astronomers have puzzled over the so-called Cold Spot — possibly the largest individual structure ever identified by humanity. Now, a team led by researchers from the University of Hawaii may have found an explanation for its existence.