APOD: Planetary Nebula Abell 7 (2022 May 21)

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APOD Robot
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APOD: Planetary Nebula Abell 7 (2022 May 21)

Post by APOD Robot » Sat May 21, 2022 4:06 am

Image Planetary Nebula Abell 7

Explanation: Very faint planetary nebula Abell 7 is some 1,800 light-years distant, just south of Orion in planet Earth's skies in the constellation Lepus, The Hare. Surrounded by Milky Way stars and near the line-of-sight to distant background galaxies, its generally simple spherical shape, about 8 light-years in diameter, is outlined in this deep telescopic image. Within its confines are beautiful, more complex details enhanced by the use of narrowband filters. Emission from hydrogen is shown in reddish hues with oxygen emission mapped to green and blue colors, giving Abell 7 a natural appearance that would otherwise be much too faint to be appreciated by eye. A planetary nebula represents a very brief final phase in stellar evolution that our own Sun will experience 5 billion years hence, as the nebula's central, once sun-like star shrugs off its outer layers. Abell 7 itself is estimated to be 20,000 years old. Its central star is seen here as a fading white dwarf some 10 billion years old.

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orin stepanek
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Re: APOD: Planetary Nebula Abell 7 (2022 May 21)

Post by orin stepanek » Sat May 21, 2022 11:42 am

Abell_7-2022-02-20-HOO-1024.jpg
Kindq looks like a real planet with continents and oceans! :mrgreen: But just
wispy like a ghost!
lepus28vm-b.jpg
Just below Orion, Lepus! Thanks for sharing! 8-)
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Orin

Smile today; tomorrow's another day!

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johnnydeep
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Re: APOD: Planetary Nebula Abell 7 (2022 May 21)

Post by johnnydeep » Sat May 21, 2022 7:59 pm

The "years hence" link led me to the interesting bulleting board https://www.futuretimeline.net/forum/index.php, which uses the same phpBB software as asterisk.
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"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."