DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Planets in NGC 2440 planetary nebula. Computer illustration of planets within the NGC 2440 planetary nebula. NGC 2440 lies around 4000 light years from Earth in the constellation Puppis. Its central star (HD62166, left) is one of the hottest known, with a surface temperature of around 200,000 degrees Celsius. Radiation from this star causes some of the surrounding gas to glow, as seen here.
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