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proved the existence of galaxies other than the Milky Way
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
What did most early astronomers think made up the universe?
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
Johannes Kepler said that planets revolved around the sun in ________________ orbits.
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
Isaac Newton showed that __________________ keeps moons and planets in orbit.
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
The time required for the Earth to rotate once on its axis
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
What did ancient cultures use to mark the passage of time?
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
What did Ptolemy think was at the center of the universe?
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
This theory stated that the Earth was at the center of the universe and that the other planets and the sun revolved around the Earth
elliptical
gravity
Edwin Hubble
Earth
sun, moon, and planets
day
stars, planets, and moon
Ptolemaic theory
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