-he united to heavens and Earth (same laws applied in both places)
-because of this, experiments "here" could also tell us about "out there"
Why was determination of the distance to the Sun so important? How was it done?
-because Kepler found that the distance from the sun was related to the orbital: P2=a3
-determined by measuring timing of transits on Sun from two or more well-separated, well-known locations on Earth, geometry yeilds distance to Sun
-many errors ("black drop" effect) increases chances of error.
Today we laser-range the distance to the Moon, but the Greeks did it 2000 years ago. How?
He figured out how to measure the relative distances from the Earth (E) of the Sun (S) and the Moon (M). When the Moon is exactly half full, the angle E-M-S must be exactly 90 degrees. Therefore, a measurement of the angle M-E-S when the Moon is half full will give the ratio of the Earth-Moon distance to the Earth-Sun distance
Why were Uranus, Neptune and Pluto discovered so much later than the other planets?
Because Neptune and Pluto are too faint for the naked eye and Uranus is barely visible
Why is the discovery of Neptune touted as a `triumph of science’?
Neptune was the first planet to be predicted before it was seen.
Why was it important to show that the Earth did in fact move?