Physics – Page 11 – National Radio Astronomy Observatory

Explanation of How the Coordinates of an Object are Defined

There are a number of different coordinate systems that astronomers use to define the positions of objects in the…

As your 8-mile diameter meteor appears to be the same angular size as the Moon, which is about 0.5…

The universe is currently expanding at a rate of about 75 kilometers per second per mega-parsec. If we consider…

I believe what you are referring to is one of the predictions of Einstein’s General Theory of Relativity, which…

The short answer is that the Earth’s gravity keeps us from being flung off into oblivion. To verify this,…

Technically, yes, but the difference between the point at which a telescope in space, say in orbit around the…

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