I mean the name was really far out
but we felt Rolling Boulders didn't sound quite right
Posted on 11/24/2018 6:35:38 AM PST by ETL
Phobos’ grooves, which are visible across most of the moon’s surface, were first glimpsed in the 1970s by NASA’s Mariner and Viking missions.
Over the years, there has been no shortage of explanations put forward for how they formed.
Some planetary researchers have posited that large impacts on Mars have showered the nearby moon with groove-carving debris. Others think that Mars’ gravity is slowly tearing Phobos apart, and the grooves are signs of structural failure.
Still other scientists have made the case that there’s a connection between the grooves and the impact that created a large crater called Stickney.
In the 1970s, University of Lancaster’s Professor Lionel Wilson and Brown University’ Professor Jim Head proposed the idea that ejecta — bouncing, sliding and rolling boulders — from Stickney may have carved the grooves.
For a moon the size of the diminutive Phobos (17 miles, or 27 km, across), Stickney is a huge crater at 5.6 miles (9 km) across.
“The impact that formed it would have blown free tons of giant rocks, making the rolling boulder idea entirely plausible,” said Ken Ramsley, a researcher in the Department of Earth, Environmental and Planetary Sciences and the School of Engineering at Brown University.
“But there are also some problems with the idea. For example, not all of the grooves are aligned radially from Stickney as one might intuitively expect if Stickney ejecta did the carving And some grooves are superposed on top of each other, which suggests some must have already been there when superposed ones were created.”
“How could there be grooves created at two different times from one single event?”
(Excerpt) Read more at sci-news.com ...
Also called Luna
I doubt that many Freepers follow the Electric Universe theory - they are mostly firmly entrenched in 1950s astrophysical science.
They want their boulders nice and round
even if they aren’t to be found ...
Whoa. Going to bed, now. I’ve had all the “science” I can handle for one day.
I mean the name was really far out
but we felt Rolling Boulders didn't sound quite right
I added some:
http://www.freerepublic.com/tag/stickneycrater/index
http://www.freerepublic.com/tag/phobos/index
Two keywords, Phobos, Stickney Crater, merged, sorted, duplicates out:
Thomas Dolby - She Blinded Me With Science
https://www.youtube.com/watch?v=-FIMvSp01C8
This is how it happened. The moon is rotating and the boulders roll about creating the grooves..... right? : )
Also if you look closely you will find that the boulders are gathering no moss.
I love APOD!!!
TXnMA
The proper name of our moon is Luna. It's where we get the word, lunar.
Which is one of the reasons I don't buy into the 'boulders made the grooves' theory.
Which is quite odd considering the entire Universe follows it.
Yeah, here have been a lot of pics of Phobos, and Stickney, and Deimos, over the years.
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