whitedwarf_KBell.jpg White Dwarf Outburst
The regular brightness pulsations (red) of white dwarf star PG1149+057 are visibly affected by an outburst (green). Such outbursts have been detected in two pulsating white dwarfs to date, and astronomers plan to hunt for more examples. (Credit: J.J. Hermes/Univ. of Warwick/NASA)
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