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General Category => Science, Technology and Knowledge => Topic started by: rangerrebew on April 18, 2017, 12:47:20 pm

Title: Landslides on Ceres reflect hidden ice
Post by: rangerrebew on April 18, 2017, 12:47:20 pm
Landslides on Ceres reflect hidden ice

Date:
    April 17, 2017
Source:
    Georgia Institute of Technology
Summary:
    Massive landslides, similar to those found on Earth, are occurring on the asteroid Ceres. That's according to a new study adding to the growing evidence that Ceres retains a significant amount of water ice.
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https://www.sciencedaily.com/releases/2017/04/170417181605.htm
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 18, 2017, 06:08:50 pm
is it even possible? I don't think Ceres has any gravity, seems like a "landslide" would cause  the debris to be flung into space
Title: Re: Landslides on Ceres reflect hidden ice
Post by: Joe Wooten on April 18, 2017, 06:11:23 pm
is it even possible? I don't think Ceres has any gravity, seems like a "landslide" would cause  the debris to be flung into space

All objects with mass have gravity. Ceres is massive enough to have gravity compress it into a sphere.
Title: Re: Landslides on Ceres reflect hidden ice
Post by: thackney on April 18, 2017, 07:16:35 pm
(https://solarsystem.nasa.gov/images/content/Ceres_Texas.jpg)

https://solarsystem.nasa.gov/planets/ceres/indepth
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 18, 2017, 07:43:34 pm
All objects with mass have gravity. Ceres is massive enough to have gravity compress it into a sphere.

yes, but with such low gravity it wouldn't take much for a "landslide" to reach escape velocity
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 18, 2017, 07:43:57 pm
(https://solarsystem.nasa.gov/images/content/Ceres_Texas.jpg)

https://solarsystem.nasa.gov/planets/ceres/indepth

Future colony of New Texas?
Title: Re: Landslides on Ceres reflect hidden ice
Post by: thackney on April 18, 2017, 07:51:18 pm
Future colony of New Texas?

Just considering that not only should Texas be its own country (again), maybe even its own planet.
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 18, 2017, 07:52:45 pm
Just considering that not only should Texas be its own country (again), maybe even its own planet.

you asked for it...

http://www.youtube.com/watch?v=sa6evJIBAVo
Title: Re: Landslides on Ceres reflect hidden ice
Post by: Joe Wooten on April 18, 2017, 08:29:05 pm
yes, but with such low gravity it wouldn't take much for a "landslide" to reach escape velocity

Ceres's surface gravity is about 3% of Earth's. Take Newtonian physics and calculate the end velocity of a landslide on both Earth and Ceres, you will see that the end velocity on Ceres is much lower than on Earth for the same height. The only energy source for a landslide in both places is the potential energy of height and on neither body can the rubble even get close to escape speed. Also take into consideration the vector of acceleration is downward, not upwards.

Think on it a little bit before you post nonsense.
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 19, 2017, 01:14:18 am
There was a Japanese probe Hyabusa that sent a tiny robot that was supposed to bounce along the surface of a small asteroid, the release point was too high and the bouncy robot just went into space.
Title: Re: Landslides on Ceres reflect hidden ice
Post by: Suppressed on April 19, 2017, 12:49:46 pm
(http://zinfoze.com/wp-content/uploads/2017/04/170417181605_1_900x600.jpg)
Title: Re: Landslides on Ceres reflect hidden ice
Post by: Joe Wooten on April 19, 2017, 01:59:03 pm
There was a Japanese probe Hyabusa that sent a tiny robot that was supposed to bounce along the surface of a small asteroid, the release point was too high and the bouncy robot just went into space.

The operative word here is "small". Hyabusa was sent to a small irregular asteroid. Ceres is classified as a dwarf planet. it is on the asteroid belt, but it is definitely not an asteroid.
Title: Re: Landslides on Ceres reflect hidden ice
Post by: geronl on April 19, 2017, 02:05:00 pm
(https://cdn.dribbble.com/users/398909/screenshots/1523255/spacemonkey3.png)

I shall call him "Joe" and never have to hear him again, since sound doesn't travel in space and the ignore function is high-powered
Title: Re: Landslides on Ceres reflect hidden ice
Post by: Joe Wooten on April 19, 2017, 03:07:54 pm
 :silly: :silly: