Last Updated: Tuesday, August 20, 2013, 22:51
A white-dwarf star has erupted in the constellation Delphinus and has produced a nova that is the brightest since 2007.
Last Updated: Wednesday, June 13, 2012, 12:49
A new map of the sky that accurately measures the brightness and position of over 40 million stars is expected to be available in the next two years.
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