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Chandra captures expanding debris from Tycho’s supernova remnant

13 May 2016 Astronomy Now

Astronomers have observed the debris field from the supernova of 1572, now known as Tycho’s supernova remnant, with NASA’s Chandra X-ray Observatory and the NSF’s Karl G. Jansky Very Large Array (VLA). By combining the X-ray data with some 30 years of observations in radio waves, astronomers have also produced a movie showing the expansion from the explosion is still continuing 444 years later.

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Dying white dwarf star suffers “irregular heartbeats”

27 August 2015 Astronomy Now

Astronomers at the University of Warwick analysing data from NASA’s Kepler spacecraft have discovered a unexpected anomaly in the ‘pulse’ of aging white dwarf star PG1149+057. In addition to the expected regular rhythm of pulsations, the researchers observed arrhythmic, massive outbursts, which significantly heated up the star’s surface for many hours.