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Hubble helps find light-bending world orbiting two stars

23 September 2016 Astronomy Now

A distant planet orbiting two red dwarf stars, found by its warping of spacetime, has been confirmed using observations from the NASA/ESA Hubble Space Telescope. The planet’s mass caused what is known as a microlensing event, where light is bent by an object’s gravitational field. This is the first circumbinary planet to be confirmed following detection of a microlensing event.

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Using gravitational waves to catch runaway intergalactic black holes

4 July 2016 Astronomy Now

Researchers at the University of Cambridge have developed a new method for detecting and measuring one of the most powerful, and most mysterious, events in the universe — a black hole being kicked out of its host galaxy and into intergalactic space at speeds as high as 5,000 kilometres per second (11 million miles per hour).

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Gravitational waves detected from second pair of coalescing black holes

15 June 2016 Astronomy Now

Three months after announcing the first detection of gravitational waves, scientists report a second observation of the merger of two black holes made on 26 December 2015. The scientists were able to infer that the mass of the black holes was between 8 and 14 solar masses and the event took place at a distance of about 1.4 billion light-years from Earth.

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Gravity saved the universe after the Big Bang?

19 November 2014 Astronomy Now

Recent theories suggest that the production of Higgs particles in the inflationary phase of the early universe should have led to instability and collapse. Now a European team offers an explanation why this didn’t happen, answering fundamental questions about how we are all here.