The study of space Kepler's Law
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When a body in space travels around a larger body in space it is said to _____________ around the larger body.
Why do astronauts in space appear weightless?
The speed at which any planet moves through space is constantly changing. In a perfectly circular orbit, the orbital radius of the planet would be constant and therefore so would be its observed angular velocity. In elliptical orbits, the velocity varies. In elliptical orbits, the orbital radius of the satellite will vary and therefore so will its velocity. The planet travels "faster" when closer to the Sun, then "slower" at a more distant radius. According to Newton's 2nd Law, what is the underlying force behind this change in velocity?
A way of measuring distances in space. Equivalent to the distance from Earth to the Sun.