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Astronomy Picture of the Day - Galaxy Wars: M81 and M82
APOD.NASA.gov ^ | 20 Jan, 2023 | Image Credit & Copyright: Andreas Aufschnaiter

Posted on 01/20/2023 12:44:44 PM PST by MtnClimber

Explanation: The two dominant galaxies near center are far far away, 12 million light-years distant toward the northern constellation of the Great Bear. On the right, with grand spiral arms and bright yellow core is spiral galaxy M81. Also known as Bode's galaxy, M81 spans some 100,000 light-years. On the left is cigar-shaped irregular galaxy M82. The pair have been locked in gravitational combat for a billion years. Gravity from each galaxy has profoundly affected the other during a series of cosmic close encounters. Their last go-round lasted about 100 million years and likely raised density waves rippling around M81, resulting in the richness of M81's spiral arms. M82 was left with violent star forming regions and colliding gas clouds so energetic that the galaxy glows in X-rays. In the next few billion years, their continuing gravitational encounters will result in a merger, and a single galaxy will remain. This extragalactic scenario also includes other members of the interacting M81 galaxy group with NGC 3077 below and right of the large spiral, and NGC 2976 at upper right in the frame. Captured under dark night skies in the Austrian Alps, the foreground of the wide-field image is filled with integrated flux nebulae. Those faint, dusty interstellar clouds reflect starlight above the plane of our own Milky Way galaxy.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa
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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 01/20/2023 12:44:44 PM PST by MtnClimber
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To: MtnClimber

2 posted on 01/20/2023 12:45:05 PM PST 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 01/20/2023 12:45:44 PM PST 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

We will all be in one gigantic humongous colossal stupendous galaxy at some point in time....................


4 posted on 01/20/2023 12:49:15 PM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger
The Milky Way, M31, and M33 will merge sometime in the next few billion years. But the combined galaxy will be nothing close to the largest of them.


5 posted on 01/20/2023 12:56:59 PM PST by Telepathic Intruder
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To: Telepathic Intruder

ALL galaxies will merge...............


6 posted on 01/20/2023 1:04:42 PM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger
When Galaxies collide.


7 posted on 01/20/2023 1:07:22 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
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To: Larry Lucido

My parents had one of those cars...................


8 posted on 01/20/2023 1:08:23 PM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Telepathic Intruder

If we can get M87 to join with Andromeda and the Milky Way, we might have a chance against IC 1101.


9 posted on 01/20/2023 1:09:00 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
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To: Larry Lucido

No seat belts back then.


10 posted on 01/20/2023 1:10:04 PM PST by Loud Mime ("The Real Constitution and its Real Enemies" now available on Amazon. Check it out!)
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To: Loud Mime; Red Badger

I remember.


11 posted on 01/20/2023 1:10:29 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
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To: Telepathic Intruder
IC 1101

L-1011.


12 posted on 01/20/2023 1:12:26 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
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To: Red Badger

Must I remind you that the universe is expanding beyond its escape velocity? Like steady state, the big crunch theory is now obsolete. The expansion is accelerating. Local groups and galaxy clusters may eventually merge after a googol or so years, but super galactic clusters will not as they are not gravitationally bound. And if the Big Rip theory is true, the universe will end in 20 billion years.


13 posted on 01/20/2023 1:13:51 PM PST by Telepathic Intruder
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To: Larry Lucido

I found a pic that looks just like the car they had!................

14 posted on 01/20/2023 1:14:33 PM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger

/ End thread hijack

15 posted on 01/20/2023 1:16:55 PM PST by Larry Lucido (Donate! Don't just post clickbait!)
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To: Larry Lucido

I won’t tell IC 1101 you said that.


16 posted on 01/20/2023 1:24:52 PM PST by Telepathic Intruder
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To: Telepathic Intruder

Absolutely magnificent.

My mind is far too finite on this side of the Great Divide to fully comprehend such wonders, but I’d love to be able to spend part of Eternity exploring them.


17 posted on 01/20/2023 1:42:18 PM PST by AFB-XYZ (Stand up, or bend over)
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To: AFB-XYZ

Yep, there’s plenty to blow your mind. The amazing thing to me is that we are capable of seeing the entire universe almost as far as it is possible to see. Because beyond a certain point, the universe is expanding faster than the speed of light.


18 posted on 01/20/2023 1:58:38 PM PST by Telepathic Intruder
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To: Red Badger

19 posted on 01/20/2023 2:08:45 PM PST by GaltAdonis
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To: MtnClimber

Who knows how many worlds there might be in those three galaxies.


20 posted on 01/20/2023 3:16:22 PM PST by SkyDancer (Hold on tight to your dream)
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