Martian Moon Phobos Got Its Strange Grooves from Rolling Boulders

Sci-News.com ^ | Nov 22, 2018 | News Staff / Source

[moovova]

Just some Goodfellas playing bocce ball...

[UCANSEE2]

"OK, I got it. We'll call our band the Rolling Boulders."

[C210N]

Maybe the grooves were not formed while Phobos was/is a moon.

Perhaps this was a rolling rock on the surface of Mars. Grooves formed from the rolling. A nearby very large impact spewed debris, including Phobos, off the planet. Phobos entered a stable orbit.

[moovova]

[moovova]

[Larry Lucido]

[ETL]

Lol! I know exactly where that is! I grew up that neighborhood: Lower East Side, New York City. In fact, my grandfather used to play bocci there: Houston Street. He owned a barbershop on Clinton Street, just off Houston.

[Larry Lucido]

Just because a Phobos got a groove don't make it in the groove.

[xp38]

A right turning rock. Definitely a Freeper for sure!

[Kirkwood]

Comets are balls of ice and rocks. They aren’t made of plasma and they don’t burn.

[xp38]

Wait my mistake. Left turning. A Dummie instead.

[spokeshave2]

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,

This does not compute

If Phobos is 27 KM in diameter...then its gravitational attraction would be too small to retain a rolling boulder on its surface.

Since " blown free tons of giant rocks" is related to rocks on the earth...with a gravitational attractive force causing acceleration of 32 ft per second.

[UCANSEE2]

Lastly, where are the boulders? There are none to be seen.

Well.... there is this one boulder.

[ETL]

Thanks for these! That is the time frame when I lived there. Born 1957, moved Oct 1970. Looking carefully at the pics for my grandfather! Got any more?

[dangus]

I don’t get it. The gravity would be minimal. So with what force would the boulders have etched the scars?

[moovova]

I just did a search on duckduckgo for "Italians playing bocce" under the "image" tab.

When I was stationed in Sicily (mid-70s), we enjoyed watching the old Sicilian men playing bocce. They were dead serious about it...and GOOD at the game.

https://duckduckgo.com/?q=Italians+playing+bocce&t=ucbrowser&iax=images&ia=images

[bgill]

The Rolling Boulders had bigger hits than the Rolling Stones.

[ETL]

The Rolling Boulders had bigger hits than the Rolling Stones.

The Rolling Boulders. Sounds like a band from Bedrock, as in the Flintstones. They actually did have a 60s-era band on in one episode: The Beau Brummelstones, a play on the group, The Beau Brummels, who had the 60s hit "Laugh Laugh". They even had them performing that song.

[dljordan]

Those would have to be some damned big boulders.

[mikrofon]

“How Stellar Objects get their Groove back”

(Sounds like a documentary from a while ago ;-)