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

Skip to comments.

Astronomy Picture of the Day - Crossing Saturn's Ring Plane
NASA ^ | 16 Nov, 2025 | Image Credit: NASA, ESA, JPL, ISS, Cassini Imaging Team; Processing: Fernando Garcia Navarro

Posted on 11/16/2025 1:03:09 PM PST by MtnClimber

Explanation: If this is Saturn, where are the rings? When Saturn's "appendages" disappeared in 1612, Galileo did not understand why. Later that century, it became understood that Saturn's unusual protrusions were rings and that when the Earth crosses the ring plane, the edge-on rings will appear to disappear. This is because Saturn's rings are confined to a plane many times thinner, in proportion, than a razor blade. In modern times, the robotic Cassini spacecraft that orbited Saturn frequently crossed Saturn's ring plane during its mission to Saturn, from 2004 to 2017. A series of plane crossing images from 2005 February was dug out of the vast online Cassini raw image archive by interested Spanish amateur Fernando Garcia Navarro. Pictured here, digitally cropped and set in representative colors, is the striking result. Saturn's thin ring plane appears in blue, bands and clouds in Saturn's upper atmosphere appear in gold. Details of Saturn's rings can be seen in high dark shadows. The moons Dione and Enceladus appear as bumps in the rings.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; nasa
Message from Jim Robinson:

Dear FRiends,

We need your continuing support to keep FR funded. Your donations are our sole source of funding. No sugar daddies, no advertisers, no paid memberships, no commercial sales, no gimmicks, no tax subsidies. No spam, no pop-ups, no ad trackers.

If you enjoy using FR and agree it's a worthwhile endeavor, please consider making a contribution today:

Click here: to donate by Credit Card

Or here: to donate by PayPal

Or by mail to: Free Republic, LLC - PO Box 9771 - Fresno, CA 93794

Thank you very much and God bless you,

Jim

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 11/16/2025 1:03:09 PM PST by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 11/16/2025 1:03:53 PM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: 21stCenturion; 21twelve; 4everontheRight; A Navy Vet; A_perfect_lady; abb; AFB-XYZ; AFPhys; ...
Pinging the APOD list

🪐 🌟 🌌 šŸ”

3 posted on 11/16/2025 1:04:40 PM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

So is that Earth in comparison?


4 posted on 11/16/2025 2:28:10 PM PST by SkyDancer ( ~ Am Yisrael Chai ~)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber
...will appear to disappear.

I turned around and there it was....gone.

(nice writing)

5 posted on 11/16/2025 4:25:21 PM PST by ROCKLOBSTER (Show me a RAT, I'll show you a felon.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

I have always sought out Cassini’s close-up photos of Saturn’s rings. Close enough that individual chunks of ice, or whatever the rings are made of, are imaged. I’ve seen photos of shepherd moons between the different rings and other phenomena such as ā€œwavesā€ and ā€œpropellersā€. But no individual ring particles. That would be fascinating.


6 posted on 11/16/2025 5:37:58 PM PST by telescope115 (Ad Astra, Ad Deum…)
[ Post Reply | Private Reply | To 3 | 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