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

Skip to comments.

Astronomy Picture of the Day - The Asymmetric Nebula Surrounding Wolf-Rayet Star 18
APOD.NASA.gov ^ | 9 Nov, 2022 | Image Credit & Copyright: Alex Woronow

Posted on 11/09/2022 12:59:51 PM PST by MtnClimber

Explanation: Why does the nebula around the star WR-18 shine brighter on one side? Also known as NGC 3199, this active star and its surrounding nebula lie about 12,000 light-years away toward the nautical southern constellation of Carina. The featured deep image has been highly processed to bring out filamentary details of the glowing gas in the bubble-shaped nebula. The nebula is about 75 light-years across. Near the nebula's center is a Wolf-Rayet star, WR-18, which is a massive, hot, short-lived star that generates an intense and complex stellar wind. In fact, Wolf-Rayet stars are known to create nebulas with interesting shapes as their powerful winds sweep up surrounding interstellar material. In this case, the bright right edge was initially thought to indicate that a bow shock was being produced as the star plowed through a uniform medium, like a boat through water. Recent measurements and analyses, however, have shown the star is not moving quickly toward the bright edge. A more likely explanation has emerged that the material surrounding the star is not uniform, but clumped and denser near the bright edge.


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 11/09/2022 12:59:51 PM PST by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 11/09/2022 1:00:16 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; AFPhys; America_Right; AZ .44 MAG; ...
Pinging the APOD list.

🪐 🌟 🌌 🍔


3 posted on 11/09/2022 1:01:01 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

Wow, fascinating.


4 posted on 11/09/2022 1:03:14 PM PST by No name given (Anonymous is who you’ll know me as. )
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Oh, wait. Wolf-Rayet, not Ranier Wolfcastle.

5 posted on 11/09/2022 1:05:09 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

Looks like one of those color-blind tests they make you interpret at the eye doctor.


6 posted on 11/09/2022 1:06:27 PM PST by BenLurkin (The above is not a statement of fact. It is either opinion, or satire, or both.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber
Looks like Rick:


7 posted on 11/09/2022 2:08:59 PM PST by Boogieman
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

MtnClimber; Thanks for posting!

Humm....pareidolia!

Cosmic etch a sketch or vaguely organized Jackson Pollack painting!


8 posted on 11/09/2022 5:05:19 PM PST by Pete from Shawnee Mission ( )
[ 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