Quote: Originally Posted by selfsame
Moon has a day of 14 1/2 of our days, and its night is also 14 1/2 of our days.
It has no atmosphere or water and there is no life on it.
It has a large number of craters; and a thick layer of fluffy sand.
It has a large number of mountains; and it faces the earth with one face only, the other hemisphere is invisible to us on earth.
Its core is cold.
It has a fluctuating surface temperature: from severe heat at day time, to severe coldness at its night.
Planet Mercury has much similarity to our Moon, with many differences, like that: Mercury has one of its hemispheres always facing the sun with a perpetual day on this side, while the other hemisphere is in perpetual night.
(Notice the difference: our Moon faces the sun for 14 1/2 of our days, and then this side will be in the darkness of night for 14 1/2 of our days.
Are you sure about that math? The moon orbits the earth about once every 24 hours. Since it is in tidal lock the sun should shine on the whole moon during that one day, about 12 hours per day on any one spot.
Okay, no life.
Odd that all that fluffy dust that was being thrown all over that it only landed in the part of the earth that would not be a 'protruding rock' as evidenced in all the Apollo pics.
How do you know the core is cold, at 1 time it had to be molten and the core being heavier was attracted to earth more than the lighter material that makes up the crust of the surface. Moving further away over time means the migration would stop due to less gravity being applied rather than it becoming too cold. As it cooled off there should have been come subduction as the core and mantle shrank in size that happens when any mass loses heat.
Perhaps our core is being pulled towards the sun at a slightly faster rate than the crust and that is pulling the core off center and it's interaction with the magma is to slow its speed down and that relates to the days and night being longer over time.
It sound likes mercury is also in a tidal lock with the sun just like the moon is with the earth.
Venus has an atmosphere that is 'active' so perhaps constant winds can affect the rotation of a whole planet if they blow the same direction for millions of years. Nor do I know the speed of the bigger planets at the same diameter the earth is so speculation has it's limits at the moment.
Quote: Originally Posted by gopher
Nice house,until you come home some day and it has rolled away. Might be the ticket for getting through a twister though, or inside of a soccer ball sized clear one and send the camera out into the storm to go where the wind blows it. Then turn that into an I-Max VR ride.