Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day - NGC 6888: The Crescent Nebula
NASA ^ | 28 Nov, 2025 | Image Credit & Copyright: Greg Bass

Posted on 11/28/2025 3:01:24 PM PST by MtnClimber

Explanation: NGC 6888, also known as the Crescent Nebula, is a about 25 light-years across, a cosmic bubble blown by winds from its central, massive star. This deep telescopic image includes narrowband image data, to isolate light from hydrogen and oxygen atoms. The oxygen atoms produce the blue-green hue that seems to enshroud the nebula's detailed folds and filaments. Visible within the nebula, NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years. In fact, the Crescent Nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life, this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; nasa; spacechorizo

Click here: to donate by Credit Card

Or here: to donate by PayPal

Or by mail to: Free Republic, LLC - PO Box 9771 - Fresno, CA 93794

Thank you very much and God bless you.

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 11/28/2025 3:01:24 PM PST by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 11/28/2025 3:01:44 PM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: 21stCenturion; 21twelve; 4everontheRight; A Navy Vet; A_perfect_lady; abb; AFB-XYZ; AFPhys; ...
Pinging the APOD list

🪐 🌟 🌌 🍔

3 posted on 11/28/2025 3:02:23 PM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Looks like a giant brain...................


4 posted on 11/28/2025 3:03:01 PM PST by Red Badger (Homeless veterans camp in the streets while illegals are put up in 5 Star hotels....................)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger

Tripe?


5 posted on 11/28/2025 3:08:54 PM PST by ryderann
[ Post Reply | Private Reply | To 4 | View Replies]

To: Red Badger

Spock’s Brain


6 posted on 11/28/2025 3:08:55 PM PST by BenLurkin (The above is not a statement of fact. It is opinion or satire. Or both.)
[ Post Reply | Private Reply | To 4 | View Replies]

To: ryderann

Planet Menudo?.............


7 posted on 11/28/2025 3:17:24 PM PST by Red Badger (Homeless veterans camp in the streets while illegals are put up in 5 Star hotels....................)
[ Post Reply | Private Reply | To 5 | View Replies]

To: MtnClimber

WR 136 is actually a little to the upper left of center in this case, closer to the brightest edge of the nebula. I would guess it’s moving that direction with respect to the interstellar medium, causing that side to heat up more from the colliding stuff.


8 posted on 11/28/2025 3:19:17 PM PST by Telepathic Intruder
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger

Hah! I was just looking at the recipe. Haven’t thought about tripe for years, but now I can’t get it out of my mind.


9 posted on 11/28/2025 5:52:15 PM PST by ryderann
[ Post Reply | Private Reply | To 7 | View Replies]

To: ryderann

I love menudo...................


10 posted on 11/28/2025 5:55:10 PM PST by Red Badger (Homeless veterans camp in the streets while illegals are put up in 5 Star hotels....................)
[ Post Reply | Private Reply | To 9 | View Replies]

To: Telepathic Intruder

It’s a pretty cool object.


11 posted on 11/28/2025 8:11:30 PM PST by telescope115 (Ad Astra, Ad Deum…)
[ Post Reply | Private Reply | To 8 | View Replies]

To: telescope115

And pretty dangerous. When a Wolf-Rayet star goes boom it’s known as a stripped core supernova which produces a gamma ray burst in a narrow beam along the poles. Any planets along that beam for thousands of light years gets torched. Most likely none of them are pointed at us, though.


12 posted on 11/28/2025 8:38:01 PM PST by Telepathic Intruder
[ Post Reply | Private Reply | To 11 | View Replies]

To: MtnClimber

Now that was a KABOOM!!


13 posted on 11/28/2025 10:01:05 PM PST by minnesota_bound (Making money now. Still want much more.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Telepathic Intruder

Thank God for that! Hopefully He won’t aim one at us……..


14 posted on 11/28/2025 10:42:29 PM PST by telescope115 (Ad Astra, Ad Deum…)
[ Post Reply | Private Reply | To 12 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson