History of Astronomy (javascript version)

1. If you are standing at the Earth's north pole, which of the following will be directly overhead?
A The celestial equator.
BThe ecliptic.
C The zodiac.
DThe north celestial pole.
EThe Sun.

2. A planet in retrograde motion
Arises in the west and sets in the east.
B shifts westward with respect to the stars.
Cshifts eastward with respect to the stars.
Dwill be at the north celestial pole.
Ewill be exactly overhead no matter where you are on Earth.

3. The circular shape of the Earth's shadow on the Moon led early astronomers to conclude that
Athe Earth is a sphere.
Bthe Earth is at the center of the Solar System.
Cthe Earth must be at rest.
Dthe Moon must orbit the Sun.
Ethe Moon is a sphere.

4. Galileo used his observations of the changing phases of Venus to demonstrate that
A the Sun moves around the Earth.
B the Universe is infinite in size.
C the Earth is a sphere.
D the Moon orbits the Earth.
E Venus follows an orbit around the Sun rather than around the Earth.

5. Kepler's third law
A relates a planet's orbital period to the size of its orbit around the Sun.
B relates a body's mass to its gravitational attraction.
C allowed him to predict when eclipses occur.
D allowed him to measure the distance to nearby stars
E showed that the Sun is much farther away than the Moon.

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