News

Interacting galaxies produce eye-shaped “tsunami” of stars

5 November 2016 Astronomy Now

Astronomers using the Atacama Large Millimetre/submillimetre Array (ALMA) have discovered a tsunami of stars and gas that is crashing midway through the disc of a spiral galaxy known as IC 2163. This colossal wave of material — which was triggered when IC 2163 recently sideswiped another spiral galaxy dubbed NGC 2207 — produced dazzling arcs of intense star formation that resemble a pair of eyelids.

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Galactic get-together has impressive light display

12 December 2014 Astronomy Now

NGC 2207 and IC 2163 are two colliding galaxies in the constellation of Ursa Major some 130 million light-years from Earth. Between them they have produced one of the most bountiful collections of ultraluminous X-ray sources (ULXs) known.