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Anne’s Image of the Day: Planetary Nebula Abell 7

8 Apr 2014, 13:29 UTC
Anne’s Image of the Day: Planetary Nebula Abell 7
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April 8, 2014 Abell 7, an ancient planetary nebula in Lepus Image Credit & Copyright: Don Goldman, Astrodon Imaging Abell 7 (also known as PNG 215.5-30.8 and PK 215-30.1) is a very faint and old planetary nebula of about 8 light-years across, located some 1,800 light-years away from Earth in the southern constellation of [continue reading]

April 8, 2014
Abell 7, an ancient planetary nebula in Lepus

Image Credit & Copyright: Don Goldman, Astrodon Imaging
Abell 7 (also known as PNG 215.5-30.8 and PK 215-30.1) is a very faint and old planetary nebula of about 8 light-years across, located some 1,800 light-years away from Earth in the southern constellation of Lepus (the Hare), which is located immediately south of the constellation of Orion (the Hunter), and is sometimes represented as a hare being chased by Orion.
Despite their name, planetary nebulae have nothing to do with planets. The name of planetary nebulae arose in the 18th century because of the visual similarity between some round planetary nebulae and the planets Uranus and Neptune when viewed through small optical telescopes. The name has stuck even though modern telescopes make it obvious that these objects are not planets at all.
Planetary nebulae ...

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