Quote (Trademarks @ Feb 18 2011 09:42am)
I'm pretty sure that Earth's mass remains unchanged. Gravity is directly related to mass so I doubt it changes.
The earth accumulates several hundered tons of space debris every year.
Quote (Trademarks @ Feb 18 2011 09:42am)
I'm pretty sure I've read somewhere that Moon was SLOWLY drifting away from earth's orbit. I can't remember the explanation but logically it can be explained by the Sun's attraction being stronger than Earth's or simply Moon's rotation that prevent it to fall on the Earth being strongest than the actual gravity.
I guess I can finally shed light on this and not let it go any farther since no one has yet to get it right in this thread.
The moon's gravity tugs on the earth creating a tidal buldge (which is responsible for the tides), and since the earth rotates this buldge is always slightly ahead of the moon placing more mass ahead of the moon and less behind it. This in turn tugs back on the moon increasing its velocity which puts it into a higher orbit, farther from earth, but it is only a few inches per year.
Now to specifically address some of ChessMastr117's claims
Quote (ChessMastr117 @ Feb 9 2011 11:58pm)
Pretty soon the Tides of the ocean will be effected.
In 1 million years, the moon will have drifted about 3 million inches farther from earth which is a little more than 47 miles. Now, the moon's orbit is eliptical so it doesn't have a set distance from earth. At apogee it is at the frathest point of this elipse from earth at ~251,968 miles and at perigee it is at the closest point at ~221,463 miles. So through the course of a lunar cycle the moon's distance from earth varies by over 30,000 miles so to claim that the tides will soon be affected by the departing moon is, for lack of a better word, retarded.
Quote (ChessMastr117 @ Feb 9 2011 11:58pm)
soon the moon will just float away, and collide with another planet, possibly the earth.
Quote (ChessMastr117 @ Feb 10 2011 12:12am)
No Is will STOP oprbiting the Earth.... And start orbiting the SUN... and the MOONS ORBIT WILL BE SO CLOSE TO THE EARTH that it might interfere with it....
By our best estimates the sun will "die" in about 5 billion years, and in that 5 billion years, at an average of 3in per year (not claiming it will stay at that, if anything it should slow down), the moon will only have ~doubled it's current orbit, so these claims are just completely wrong.