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A group of stars that appear to form an object in the sky.
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- When NASA and a group of astronomers sent up a spacecraft designed to find planets orbiting other stars, they named it after Kepler. Why was this an appropriate name?- Kepler was the first person to express the law of universal gravity in mathematical terms- Kepler was the first person to suggest how to launch rockets into space- Kepler used his telescope to find the first planet orbiting another star- Kepler designed the first telescope ever built- Kepler figured out the rules of planetary motion, which planets in our solar system and planets elsewhere must obey
- What is the difference between a bound orbit and an unbound orbit around the Sun?A. An object on a bound orbit follows the same path around the Sun over and over, while an object on an unbound orbit approaches the Sun just once and then never returns.B. An object on a bound orbit has a gravitational attraction to the Sun, while an object on an unbound orbit does not.C. A bound orbit is an orbit allowed by the universal law of gravitation, and an unbound orbit is not.D. A bound orbit is circular, while an unbound orbit is elliptical.
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