Astronomy Flashcards
(140 C.E.) Believed that Earth was the center of the universe and the planets and sun revolved around the Earth.
Ptolemy
(1543) Believed that the sun is the center of the universe and all the planets revolved around the sun.
Copernicus
(late 1500s) Recorded very precise observations of the planets and stars.
Brahe
(1609) Used Brahe’s work to determine that all the planets revolve around the sun in elliptical orbits.
Kepler
(1609) Used a telescope to make important discoveries about the moon and sun.
Galileo
(1687) Discovered that all objects in the universe attract each other through gravitational force.
Isaac Newton
(1924) Proved that other galaxies exist beyond the Milky Way.
Edwin Hubble
Great Bear constellation
Ursa Major
Little Bear constellation tail is the handle of the big dipper.
Ursa Minor
The Hunter constellation
Orion
One of the 48 constellations found by Ptolemy.
Canis Major
Constellation named after a queen in the north sky.
Cassiopeia
A large, reddish star late in its life cycle.
Red Giant
A small, hot, dim star that is the leftover center of an old star.
White dwarf
The location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right to the upper left.
Main sequence
