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Image of the Day: The Glowing Eye Nebula

13 Mar 2014, 13:07 UTC
Image of the Day: The Glowing Eye Nebula
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March 13, 2014 NGC 6751, a planetary nebula in Aquila Image Credit: NASA/ESA and The Hubble Heritage Team (STScI/AURA) NGC 6751 (nicknamed the “Glowing Eye Nebula”) is a planetary nebula of some 0.8 light-year across (about 600 times the size of our Solar System), located roughly 6,500 light-years away from Earth in the northern [continue reading]

March 13, 2014
NGC 6751, a planetary nebula in Aquila

Image Credit: NASA/ESA and The Hubble Heritage Team (STScI/AURA)
NGC 6751 (nicknamed the “Glowing Eye Nebula”) is a planetary nebula of some 0.8 light-year across (about 600 times the size of our Solar System), located roughly 6,500 light-years away from Earth in the northern constellation of Aquila (the Eagle). It was formed several thousand years ago, and is expanding at a speed of about 40 kilometers (25 miles) per second.
Planetary nebulae have nothing to do with planets. The name 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.
When a star with a mass up to ...

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