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Astronomy Picture of the Day - Planetary Nebula Abell 7
APOD.NASA.gov ^ | 21 May, 2022 | Image Credit & Copyright: Donald Waid, Ron Dilulio

Posted on 05/21/2022 2:27:44 PM PDT by MtnClimber

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.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa
To be added or removed from the Astronomy Picture of the Day ping list please send me a request via "Private Reply" (Mail).

For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.

1 posted on 05/21/2022 2:27:44 PM PDT by MtnClimber
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To: MtnClimber

2 posted on 05/21/2022 2:28:02 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; AFPhys; America_Right; AZ .44 MAG; ...
Pinging the APOD list.

🪐 🌟 🌌 🍔


3 posted on 05/21/2022 2:28:47 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber

These pictures always remind me of those brain activity images.


4 posted on 05/21/2022 2:42:22 PM PDT by Jamestown1630 ("A Republic, if you can keep it.")
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To: Jamestown1630; MtnClimber

He's showing her his big brain!


5 posted on 05/21/2022 3:25:25 PM PDT by DannyTN
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To: DannyTN

What is that? I don’t know it.


6 posted on 05/21/2022 3:30:09 PM PDT by Jamestown1630 ("A Republic, if you can keep it.")
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To: Jamestown1630

Iron man. I think maybe Iron man 2. One of Stark’s competitors pays a visit to Pepper Pots and shows her his big holographic brain.


7 posted on 05/21/2022 3:34:48 PM PDT by DannyTN
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