In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.

After tracking a puzzling X-ray signal from a dying star for decades, astronomers may have finally explained its source: The old star might have destroyed a nearby planet. Dating back to 1980, X ...

The Helix Nebula. Credit: X-ray: NASA/CXC/SAO/Univ Mexico/S. Estrada-Dorado et al.; Ultraviolet: NASA/JPL; Optical: NASA/ESA/STScI (M. Meixner)/NRAO (T.A. Rector ...

Astronomers may finally have settled the question of what is causing highly energetic X-rays from WD 2226-210, a white dwarf star located at the center of the Helix Nebula. The Helix Nebula is a ...

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The star V830 Orionis shines on the cloud of material left over from its formation, here seen as the NGC 1999 reflection nebula. The Helix Nebula is an example of a planetary nebula. Though it looks ...

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The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The Bubble Nebula is 7 light-years across and resides 7,100 ...

The Orion Nebula, 1,344 light-years away, shines in vibrant colors and serves as a stellar nursery for new stars. The Helix Nebula, 650 light-years away, resembles a cosmic eye formed by a dying ...

Orion Nebula: It is a cloud of dust and gas located in the constellation Orion. Thousands of stars are being born there. NGC 281: Dark, dense clumps of gas and dust known as 'Bok globules' can be ...