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rayreid astronomy
unit 1 test
Question | Answer |
---|---|
Earth center of the universe (geocentric) | Ptolemy |
sun was the center of the universe (heliocentric) | Coperincus |
corrected the heliocentric model by stating that planets travel in elleptical orbits | Kepler |
stated that gravity is the force holding the earth | Newton |
first to use telescope | Galileo |
large group of stars and other celestial objects | galaxy |
how galaxies are classified | shape |
an oval shaped galaxy | elliptical |
a galaxy with arms | spiral |
what seperates the inner planets from the outer planets | astteriod belt |
hottest planet | venus |
coldest INNER planet | Mars |
where energy is produced from the sun | core |
when hydrogen combines with helium and energy | nuclear fusion |
what a starscolor tells us | it's temperature |
a star that appears to circle around Polaris | circumpolar |
when a star runs out of much of it's energy and begins to expand | blackhole |
death of a star by explosion | supernova |
a small star with a enormous amount of gravity | neutron star |
tool used to find the altitude of a star | astrolabe(quadrant) |
the angle between the horizon and a star | zenith |