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Astronomy Picture of the Day - The Images not Posted during the Government Shutdown - A Horseshoe Einstein Ring from Hubble
NASA ^ | 2 Nov, 2025 | Image Credit: ESA/Hubble & NASA

Posted on 12/18/2025 8:49:03 AM PST by MtnClimber

Explanation: What's large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage. Pictured here, the gravity of a massive elliptical galaxy (luminous red galaxy: LRG) has gravitationally distorted the light from a much more distant blue galaxy. More typically, such light bending results in two discernible images of the distant galaxy, but here the lens alignment is so precise that the background galaxy is distorted into a horseshoe -- a nearly complete ring: an Einstein ring. Although LRG 3-757 was discovered in 2007 in data from the Sloan Digital Sky Survey (SDSS), the image shown above is a follow-up observation taken with the Hubble Space Telescope's Wide Field Camera 3. A recent lens analysis of the central galaxy indicates that it likely hosts the single most massive black hole yet discovered: 36 billion times the mass of our Sun.


TOPICS: Astronomy; 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 12/18/2025 8:49:03 AM PST by MtnClimber
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To: MtnClimber

2 posted on 12/18/2025 8:49:20 AM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: 21stCenturion; 21twelve; 4everontheRight; A Navy Vet; A_perfect_lady; abb; AFB-XYZ; AFPhys; ...

Pinging the APOD list

🪐 🌟 🌌 🍔


3 posted on 12/18/2025 8:50:04 AM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber

4 posted on 12/18/2025 9:15:39 AM PST by Diogenesis (Si vis pacem, para bellum)
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To: Diogenesis

So, what is that pjoto of?

Not at the NASA site.


5 posted on 12/18/2025 11:06:03 AM PST by doorgunner69
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To: doorgunner69

https://www.earth.com/news/largest-ultramassive-black-hole-ever-seen-cosmic-horseshoe-lrg-3-757/


6 posted on 12/18/2025 12:17:58 PM PST by Diogenesis (Si vis pacem, para bellum)
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To: MtnClimber

Wow.


7 posted on 12/18/2025 12:39:47 PM PST by No name given ( Anonymous is who you’ll know me as )
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To: MtnClimber

It’s really cool.


8 posted on 12/18/2025 6:42:00 PM PST by telescope115 (Ad Astra, Ad Deum…)
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