Astronomy Picture of the Day - Stellar Streams in the Local Universe

By Free Republic | Created at 2024-09-27 20:32:59 | Updated at 2024-09-30 15:31:09 2 days ago

Astronomy Picture of the Day - Stellar Streams in the Local Universe
NASA ^ | 27 Sep, 2024 | Image Credit: David Martinez Delgado et al.

Posted on 09/27/2024 1:07:37 PM PDT by MtnClimber

Explanation: The twenty galaxies arrayed in these panels are part of an ambitious astronomical survey of tidal stellar streams. Each panel presents a composite view; a deep, inverted image taken from publicly available imaging surveys of a field that surrounds a nearby massive galaxy image. The inverted images reveal faint cosmic structures, star streams hundreds of thousands of light-years across, that result from the gravitational disruption and eventual merger of satellite galaxies in the local universe. Such surveys of mergers and gravitational tidal interactions between massive galaxies and their dwarf satellites are crucial guides for current models of galaxy formation and cosmology. Of course, the detection of stellar streams in the neighboring Andromeda Galaxy and our own Milky Way also offers spectacular evidence for ongoing satellite galaxy disruption within our more local galaxy group.

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

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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 09/27/2024 1:07:37 PM PDT by MtnClimber

To: MtnClimber

2 posted on 09/27/2024 1:08:04 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)

To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; AFPhys; Agatsu77; America_Right; ...

Pinging the APOD list

🪐 🌟 🌌 🍔

3 posted on 09/27/2024 1:08:57 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)

To: MtnClimber

My first impression was strangely of a box of fishing lures...

4 posted on 09/27/2024 1:10:11 PM PDT by Jamestown1630 ("A Republic, if you can keep it.")

To: Jamestown1630

My fishing tackle box is much more tangled.

5 posted on 09/27/2024 1:13:47 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)

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