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VLA reveals spectacular “haloes” of spiral galaxies

13 October 2015 Astronomy Now

An international team of astronomers used the Karl G. Jansky Very Large Array (VLA) to investigate 35 edge-on spiral galaxies at distances from 11 million to 137 million light-years from Earth. The study has revealed that “haloes” of cosmic rays and magnetic fields above and below the galaxies’ discs are much more common than previously thought.

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Hubble reveals galaxy gas flow and star birth regulated by black-hole jets

10 August 2015 Astronomy Now

Astronomers have uncovered a unique process for how the universe’s largest elliptical galaxies continue making stars long after their peak years of star birth. NASA’s Hubble Space Telescope revealed brilliant knots and chains of hot, blue stars forming along the jets of active black holes found in the centres of giant elliptical galaxies.