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

Skip to comments.

Astronomy Picture of the Day - The Medulla Nebula Supernova Remnant
APOD.NASA.gov ^ | 18 Jan, 2021 | Image Credit & Copyright: Russell Croman

Posted on 01/18/2021 3:17:14 PM 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 by the heat generated by its collision with confining interstellar gas. Why the nebula also glows in X-ray light, though, remains a mystery. One hypothesis holds that an energetic pulsar was co-created that powers the nebula with a fast outwardly moving wind. Following this lead, a pulsar has recently been 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 130-hours of exposure with two small telescopes in New Mexico, USA, to create the featured image.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; cassiopeia; ctb1; flatearthmoron; medullanebula; nasa; science
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 zoom by moving the magnifying glass over an area and then clicking. The side bars will move the zoomed area over the photograph.

1 posted on 01/18/2021 3:17:14 PM PST by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 01/18/2021 3:17:33 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; America_Right; Art in Idaho; AZ .44 MAG; ...
Pinging the APOD list.

🪐 🌟 🌌

There is a mystery pet hidden in the explanation links for today's picture.
3 posted on 01/18/2021 3:20:37 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Dog “remains a mystery”.


4 posted on 01/18/2021 3:26:01 PM PST by Repeal The 17th (Get out of the matrix and get a real life.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

Here we go again....
Any of our members Here on this great site and have read my post already know I’m going say something about these astronomical findings.
That being said,
Just how the heck do they know that this star exploded 10,000 years ago?
They never mention that.
All I ask is to be truthful and give us the facts and not what you believe happened.
Once you get into the realm of belief you have left the field of science and have entered religion.
We should all call these things into question.
Just give the facts and stop the unproven theories that have destroyed our education system.
🤔


5 posted on 01/18/2021 3:41:41 PM PST by Pez149 (Time to stop saying a theory is fact....)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

Dark Galaxy Tomato | Baker Creek Heirloom Seeds | Growing ...

Thanks for posting!

6 posted on 01/18/2021 3:47:53 PM PST by Pete from Shawnee Mission
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Abell 85


7 posted on 01/18/2021 3:59:35 PM PST by diatomite (That grifter crook Biden or Kamella isn't my president and never will be!! Resist!!.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

Magnificent!


8 posted on 01/18/2021 5:00:18 PM PST by AFB-XYZ (Option 1 -- stand up. Option 2 -- bend over.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

The dynamic human brain?


9 posted on 01/19/2021 8:55:22 AM PST by spel_grammer_an_punct_polise (I always refer to Otto Preminger's quote about actors: "Actors are like cattle!")
[ Post Reply | Private Reply | To 1 | 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