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The measurement of Earth was important becasue it supported the belief that the Earth is round and provided a measurement for how big the Earth was. -
This is an important discovery becasue it allowed astronomers to predict planetary positions and eclipses. -
This is important becasue he is the first astronomer to state that planets orbit the Sun. -
This was an important discovery becasue other scientists realized this was a supernova and was in fact not new. -
This is an important discovery becasue it provided the first quantitative connection between planets. -
These laws were important becasue they set the foundation for basic mechanics. -
This theory is essential becasue it helps astronomers predict black holes, planetary orbits, etc in space.