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Donor Forum?

It is.

Yes, you see the same side of the Earth as people on the opposite side of the world. That's because the Earth rotates faster than the moon revolves around the Earth.

Secondly, you always see the same side of the Moon even though the Sidereal period is about 2 days less than the Synodic Period. This is because the Sidereal Period is the amount of time it takes for the moon to come to the exact same spot in outer space while revolving around the Earth, but the Synodic Period is how long it takes to get to the same spot in the sky relative to Earth.

Yes. The period of the moons revolution ironically matches the period of its spin. Because of that, the same side of the moon always faces Earth. You were right about the tidal locking

Since the direction of the sun in relation to the moon changes while the earth rotates around the sun, the lunar phases happen slightly slower than the 27.3 time period it takes to revolve.

In other words, by the time the moon reaches the spot for another full moon in 27.3 days, the sun will be about 30 degrees from where it was last month and it will actually take the moon another ~2 days to reach that spot for a real full moon to be seen on earth.

This post was edited by EndlessSky on Jun 4 2012 06:37pm

Beat me to it lol

Yes Yes .. I just couldn't figure it out that first night because I hadn't slept

Let's have a new discussion :

If the Big Bang Theory is correct - what created the "energies" to cause such a thing such as the Big Bang to even happen any ways?
and why was there only 1 "big" bang and a quadrillion "little" bangs?

first question: Two possible answers that I can think of. One is that particles pop in and out of existence in a vacuum (they're called virtual particles), so "something" coming from "nothing" happens quite regularly. The second answer is more of an observation. There is no real reason that everything must have been created in the first place. It simply COULD be the case that everything always has existed, so that the energies were there to begin with.

To the second question... In the Big Bang, space itself is what expanded. So if there had been a meter stick present that went from one side of the universe to the other, it would still stretch from one side of the universe to the other, even now. So let's say there HAD been thousands of Big Bangs going on at once, all of them right next to each other. Because space is what expanded, they would be expanding as well, but in such a way that they would never intersect with ours. There could be thousands, or millions, or even an infinite number of other universes that we can never interact with.

Excellent question! How about this: Which came first, the laws of physics, or the matter and energy and space described thereby?

yes yes, that is pretty much what I was meaning

Discuss!