CH30.1

Question 1

In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbited Earth.

Answer 1

geocentric model

Question 2

Celestial bodies do not all revolve around a single point

Answer 2

heliocentric model

Question 3

Exoplanet Exploration Program, the search for planets and life beyond our solar system.

Answer 3

extrasolar planet