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The NGC 2440-Star

NGC 2440 is a name for a planetary nebula, the Insect Nebula. In its center is a white dwarf, which emitted the nebula not long ago.
This white dwarf is the hottest star known so far. Its surface temperature is more than 200 000 kelvin (our Sun has only 6000).

Constellation: Puppis
Distance: 1600 light-years
Visual magnitude: 17.7
Luminosity: 250 * Sun
Mass: 1 * Sun

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Photo: Nasa
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