Astronomy Picture of the Day - Verona Rupes: Tallest Known Cliff in the Solar System

APOD.NASA.gov ^ | 29 Nov, 2020 | Image Credit: Voyager 2, NASA

[MtnClimber]

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[MtnClimber]

[MtnClimber]

Pinging the APOD list.

🪐 🌟 🌌

A thrill seeking dog can be found hidden in the Explanation text today.

[Fungi]

Where is the cliff in the picture?

[MtnClimber]

The cliff goes from bottom left to about the center of the photo.

[CJ Wolf]

Not changing my desktop pic for that one.

[Jim W N]

Even so, the fall might be survivable given proper airbag protection.

So if the fall doesn't kill you, the stupid freaking government air-bag will...

[ml/nj]

Verona Rupes on Uranus' moon Miranda is estimated to be 20 kilometers deep -- ten times the depth of the Earth's Grand Canyon.

So what's interesting to me is that the wizards of smart associated this with the Grand Canyon.

But the same wizards think the Grand Canyon was formed by that little Colorado River functioning as a bandsaw as the Colorado Plain was  s l o w l y  uplifted over time.

So I'd like to know if anyone is positing rivers that persist for eons and/or BS crustal uplifts that also have persisted for eons on this Uranus' moon?

ML/NJ

[ETL]

Verona Rupes (cliffs), on Uranus moon Miranda

upper center-left

(not real)

[left that other site]

Historic Episode of Family Feud...Moon Miranda over Uranis.

[left that other site]

link:

https://www.youtube.com/watch?v=tjo0dWtPa2c

[ETL]

Diagram of the Uranus system, showing moons and rings. Image Credit: NASA, ESA, and A. Feild (STScI)

[linMcHlp]

Sidling Hill road cut, Maryland, Interstate 68.

http://www.mgs.md.gov/geology/geology_tour/sideling_hill_detail.html

The peak of the present ridge, is a former river/stream bottom, from many millions of years ago.

Varying opinions exist, for what the land was like, to each side of the ridge.

Some opinions are, that the land was certainly higher, by likely to be, mostly level plains.

Other opinions are, that the land could have been much higher, and its runoff created, over those many millions of years, the large coastal Atlantic shelf, off the eastern USA.

A nearby roadside stop, used to have pamphlets that said, that the surroundling land might have been as much as 65,000 ft above *way back when* sea level.

[ETL]

Verona Rupes

Verona Rupes is a cliff on Miranda, a moon of Uranus.[3]

The cliff face, previously thought to be from 3 to 6 mi [4] high, as of 2016 is estimated to be 12 mi [5] high, which makes it the tallest known cliff in the Solar System.[6]

It may have been created by a major impact, which caused the moon to disrupt and reassemble,[3][6] or by the crust rifting.[7]

Given Miranda’s low gravity, it would take about 12 minutes to fall from the top, reaching the bottom at the speed of about 125 mi/hr.

Even so, the fall might be survivable given proper airbag protection.[5]

https://en.wikipedia.org/wiki/Verona_Rupes

[Nateman]

If you see the big picture of Miranda you will see it looks like it was once big separate chunks that merged together. Obviously part of one chunk was mismatched on the surface to its adjacent chunk upon merger.

[MtnClimber]

Any idea why the spin axis of Uranus and its ring is tilted roughly 90 degrees to the other planets?

[Larry Lucido]

[ETL]

NOVA: The Planet That Got Knocked On Its Side

https://www.youtube.com/watch?v=ZxoLz8KbELU

[MtnClimber]

John Kerry swung at it with a giant tennis racket and just tipped it?

[ETL]

In your photo in post 2, you can see a series of parallel vertical grooves (scratches) on the cliff faces. This is a feature commonly seen on earth where one block of bedrock slid upwards or downwards vs another.