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

Skip to comments.

Astronomy Picture of the Day - CTB 1: The Medulla Nebula
NASA ^ | 19 Jan, 2026 | Image Credit: Pierre Konzelmann

Posted on 01/19/2026 11:03:16 AM PST by MtnClimber

Explanation: What powers this unusual nebula? CTB 1 is the expanding gas shell that was left when a massive star toward the constellation of Cassiopeia exploded about 10,000 years ago. The star likely detonated when it ran out of elements, near its core, that could create stabilizing pressure with nuclear fusion. The resulting supernova remnant, nicknamed the Medulla Nebula for its brain-like shape, still glows in visible light because of the heat generated by its collision with confining interstellar gas. Why the nebula also glows in X-ray light, though, remains a topic of research. One hypothesis holds that an energetic pulsar was created and powers the nebula with a fast outwardly moving wind. Following this lead, a pulsar was found in radio waves that appears to have been expelled by the supernova explosion at over 1000 kilometers per second. Although the Medulla Nebula appears as large as a full moon, it is so faint that it took 84-hours of exposure with a small telescope in Texas, USA, to create the featured image.


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

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 01/19/2026 11:03:16 AM PST by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 01/19/2026 11:03:41 AM 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 01/19/2026 11:04:28 AM 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

It almost looks organic.


4 posted on 01/19/2026 11:13:46 AM PST by ComputerGuy
[ Post Reply | Private Reply | To 2 | View Replies]

To: ComputerGuy
It almost looks organic.

Yes, no synthetic fertilizers or pesticides.

5 posted on 01/19/2026 11:23:43 AM 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 4 | View Replies]

To: MtnClimber
The red medulla nebula — where the universe stores its deepest thoughts and occasional regrets:


6 posted on 01/19/2026 11:29:18 AM PST by Deaf and Discerning
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Wow.


7 posted on 01/19/2026 11:44:14 AM PST by No name given ( Anonymous is who you’ll know me as )
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

“Check out the big brain on Brad.”


8 posted on 01/19/2026 11:46:35 AM PST by Deaf Smith (When a Texan takes his chances, chances will be taken that's for sure.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Deaf and Discerning; MtnClimber; All

Reminds me of an old, corny sci-fi movie called “The Crawling Eye”. Saw it on Svengoolie (Me-TV).


9 posted on 01/19/2026 11:55:10 AM PST by AFB-XYZ (( We have two options: 1. Stand up, or 2. Bend over))
[ Post Reply | Private Reply | To 6 | View Replies]

To: AFB-XYZ

That’s a great movie! One of my favorite of that type.


10 posted on 01/19/2026 12:38:29 PM PST by StevenWH
[ Post Reply | Private Reply | To 9 | View Replies]

To: MtnClimber

11 posted on 01/19/2026 1:24:38 PM PST by Diogenesis (Si vis pacem, para bellum)
[ Post Reply | Private Reply | To 2 | View Replies]

To: AFB-XYZ

In Pittsburgh Me-TV is controlled by a company called Cox. Our TV supplier is Verizon. If I try to open a TV channel that is Me-TV - I get a message that Cox is trying to increase their rates so high that Verizon doesn’t want to match. So I can’t watch anything by Cox.

This is irritating because Svengoolie, and even Steelers playoffs are on Cox. So are many of my favorites.

I am sure that Cox is waiting for Verizon to cave. I hope they don’t.

F*ck Cox.


12 posted on 01/19/2026 1:28:29 PM PST by FroggyTheGremlim (Hail to Pitt!)
[ Post Reply | Private Reply | To 9 | View Replies]

To: MtnClimber

In a Universe of impossibilities, how is THAT even POSSIBLE?

Mind-blowing.


13 posted on 01/19/2026 3:32:21 PM PST by Diana in Wisconsin (I don't have, 'Hobbies.' I'm developing a robust Post-Apocalyptic skill set.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber
My wife and I have been binge watching the entire Stranger Things series.The Nebula reminds me of the colors and look of the series.
14 posted on 01/19/2026 8:01:42 PM PST by telescope115 (Ad Astra, Ad Deum…)
[ Post Reply | Private Reply | To 2 | View Replies]

To: AFB-XYZ

I remember that one. It was truly one of the all-time worst movies ever made.


15 posted on 01/20/2026 2:17:50 AM PST by ComputerGuy
[ Post Reply | Private Reply | To 9 | View Replies]

To: MtnClimber

Should be called the Jellyfish nebula.
Or God’s hammer.


16 posted on 01/20/2026 3:04:52 AM PST by minnesota_bound (Making money now. Still want much more.)
[ Post Reply | Private Reply | To 2 | 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