-
geocentric, astronomy, treatises, almagest, crater, constellations.
-
-
heliocentric, controversial, initiator, heliocentric model, revolution, not afraid.
-
-
physicist, imprisoned, telescope, compass, heliocentric, sun spots, motion
-
three laws, elliptical, planetary motion, astronomer, heliocentric, cubed distance.
-
Hanz Lippershey
-
motion, orbital cannon, calculus, telescopes, stars, gravity.
