Question

1. after the middle ages, the astronomer who changed the model of the solar system by placing the sun at its center was a. galileo. b. ptolemy. c. copernicus. d. kepler. 5. which astronomer discovered that the planets orbit the sun in oval - shaped paths called ellipses? a. kepler b. brahe c. galileo d. archimedes 6. galileo’s most important contribution to astronomy was his a. discovery that the sun is the center of the solar system. b. set of calculations of the size of each of the planets. c. discovery of the planet mars. d. description of the behavior of moving objects.

Explanation:

1. Copernicus proposed the heliocentric model placing the sun at the center of the solar - system.
2. Kepler discovered that planets orbit the sun in elliptical paths.
3. Galileo made important contributions to understanding the behavior of moving objects.

Answer:

1. c. Copernicus
2. a. Kepler
3. d. description of the behavior of moving objects