space vocab

Front

Model with Earth at Solar System's center?

Back

Geocentric

Front

Model with Sun at center of Solar System?

Back

Heliocentric

Front

Copernicus's discovery:

Back

The Sun is at the center of the Solar System.

Front

First to use a telescope for space observation?

Back

Galileo

Front

Shape of most comet orbits?

Back

Ellipse

Front

Scientist explaining gravity's role in planetary orbits:

Back

Newton

Front

Greek astronomer believed for 1400+ years despite incorrect Solar System theory.

Back

Ptolemy

Front

Factors keeping planets in orbit:

Back

Inertia and Gravity

Front

Terrestrial planet?

Back

All of the Above

Front

Inner planets are __________.

Back

made of rocks