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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.

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Earth was grown from millimetre-sized stones

18 April 2015 Astronomy Now

Researchers can now explain how asteroids are formed. According to a new study led by Lund University in Sweden, our own planet also has its origins in the same process — a cosmic ocean of millimetre-sized particles that once orbited the young Sun.

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Massive galaxies died from the inside out

16 April 2015 Keith Cooper

Some of the biggest galaxies in the Universe started to shut down their star-formation from the inside-out ten billion years ago, according to new observations made using the Very Large Telescope in Chile and the Hubble Space Telescope.

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First signs of self-interacting dark matter found?

16 April 2015 Astronomy Now

Observations of colliding galaxies made with ESO’s Very Large Telescope and the NASA/ESA Hubble Space Telescope may, for the first time, have detected dark matter interacting with other dark matter in a way other than through the force of gravity.