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New distant dwarf planet found beyond Neptune

11 July 2016 Astronomy Now

An international team of astronomers have discovered a new dwarf planet orbiting beyond Neptune. The object is roughly 435 miles in size, moving in a 700-year orbit that takes it more than 120 times further from the Sun than Earth. Designated 2015 RR245, it was found using the Canada-France-Hawaii Telescope on Maunakea, Hawaii.

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Extreme starburst in the core of a gargantuan galaxy cluster

11 September 2015 Astronomy Now

An international team of astronomers has discovered a prodigious galaxy cluster with a core bursting with new stars — an incredibly rare find. This surprising new discovery, the result of collaborative synergy from ground- and space-based observations, is the first to show that gigantic galaxies at the centres of massive clusters can grow significantly by feeding off gas stolen from other galaxies.

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Exiled stars explode far from home

5 June 2015 Astronomy Now

Hubble Space Telescope images confirm that three supernovae discovered several years ago exploded in the dark emptiness of intergalactic space — their nearest neighbours probably 300 light-years away — having been flung from their home galaxies millions or billions of years earlier.

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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.