The White Dwarf Star In V407 Cygni Coffee Mug
The white dwarf star in V407 Cygni, shown here in an artist's concept, went nova in 2010. Scientists think the outburst primarily emitted gamma rays (magenta) as the blast wave plowed through the gas-rich environment near the system's red giant star.
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 as the blast wave plowed through the gas-rich environment near the system's red giant star.)
