moses wrote:There is another theory that has Mars as a moon of some other body with one side of Mars always facing this other body just like the Moon and Earth. Then there was a constant discharge between Mars and this other body which eroded away one side of Mars.
moses wrote:Again, only one side of the Moon faces the Earth. So if conditions became very electrical there might be a discharge between the Earth and the Moon which could etch away one side of the Moon only.
Mars might have been in an orbit that took about 24 hrs to do I lap of this other body. Upon escaping this other body the 24 Hr rotation would continue. And Mars and Earth might have interacted sufficiently to bring their roatations to the same amount, nearly.
There at untold theories about planetary interactions, but this is not the place to go into them. But there are geological clues that help us form theories, like the layered sediment on Earth. It is a very interesting subject, but not here.
Cheers,
Mo
moses wrote:Again, only one side of the Moon faces the Earth. So if conditions became very electrical there might be a discharge between the Earth and the Moon which could etch away one side of the Moon only.
Mars might have been in an orbit that took about 24 hrs to do I lap of this other body.
Upon escaping this other body the 24 Hr rotation would continue.
And Mars and Earth might have interacted sufficiently to bring their roatations to the same amount, nearly.
There at untold theories about planetary interactions, but this is not the place to go into them.
But there are geological clues that help us form theories, like the layered sediment on Earth.
Mars does not share an axial tilt with the Sun, but rather with the Earth.Metryq wrote: while Jupiter, Mars and the Sun share a similar axial tilt.
nick c wrote:Mars does not share an axial tilt with the Sun, but rather with the Earth.
moses wrote:I'm just pointing out that good alternative theories exist and being firmly set on one is perhaps not a good idea.
leo vuyk wrote:... Hyperion could be an old comet nuleus!
The biggest planetary ring in the solar system is much bigger than previously thought, say scientists.
A new study, reported today in Nature, has found that Saturn's outermost ring is nearly 300 times the size of the planet it orbits.
"Nobody expected [planetary] rings to ever be this large," says lead author, Professor Douglas Hamilton of the University of Maryland.
"The textbooks all say that rings are small, located close to their planet."
Saturn's largest ring was originally discovered by Hamilton and colleagues in 2009, and is named after the Saturnian moon Phoebe, which is the source of the particles that make up the ring.
In the previous study the ring was detected between distances of 128 and 207 Saturn radii, but new measurements using NASA's WISE spacecraft have given the researchers a better picture and increased its size by 30 percent.
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