All of the above
The acceleration of the object is zero.
The velocity of the object is constant.
The acceleration of the object is toward the center of motion.
The angular momentum of the object is zero.
The speed of the object is changing.
The diameter of Earth.
The diameter of the moon.
The distance from Earth to the Sun.
The diameter of the Sun.
The phases of the Moon cycle with a period that is longer than its siderial period
The observed phase of the Moon changes over the course of one night
Everyone on Earth observes the same phase of the Moon on a given night
In some phases, the Moon can be observed during the day
Sun, Earth, solar system, Galaxy
Earth, Sun, Galaxy, solar system
Earth, Sun, solar system, Galaxy
Earth, Galaxy, Sun, solar system
Decreases in brightness as it passes through the Earth's shadow
Slows down because it feels the Earth's gravitational pull
Exhibits retrograde motion
Moves into a more elliptical orbit
The same time
He developed a theory of gravity that could explain orbital motion.
He said that the Earth is not at the center of the universe.
He discovered that the planets move around the Sun in elliptical orbits.
He used a telescope to observe the heavens, thereby reinforcing the moiton of heliocentricity.
He made extensive and detailed observations of the positions of planets.
The orbital sspeed of each planet is constant.
The orbital speed of a planet varies in no predictable way.
A planet moves at its fastest when it is closest to the Sun.
A planet moves at its slowest when it is closest to the Sun.
The force must be attractive.
The force must be repulsive.
The force must vary inversely with distance.
The force must vary inversely with distance squared.
Both a and d above.
The Earth's northern hemisphere is tilted toward the Sun
The Earth's northern hemisphere is tilted away from the Sun
The Earth is closer to the Sun
Better access to high energy radiation such as ultraviolet light and X-rays
Better access to low energy radiation such as infrared and microwave radiation
Avoids the blurring of images caused by the Earth's atmosphere
All of the above
South celestial pole
Stages of heaven
Signs of the zodiac
Nodes of the ecliptic
The Moon's orbit is elliptical
Earth is far more massive than the Moon
The Sun is far more massive than the Moon
Earth's orbit around the Sun is elliptical
Inside stars and supernovae
In the early universe
In the core of Earth
The Moon always keeps the same side turned toward the Earth
The Moon's orbit is tilted with respect to the Earth's rotational axis
The Earth must rotate so an observer can see the Moon
The Earth moves significantly in its orbit around the Sun during that time
Rotational period of the Moon equals the orbital period of the Moon around the Earth
Rotational period of the Moon equals the rotational period of the Earth
Rotational period of the Moon equals the orbital period of the Earth around the Sun
Moon does not rotate as it orbits the Earth
A unique center of the universe exists
The universe looks the same everywhere as long as you look on large enough spatial scales
Physical laws may change from place to place in the universe
The universe is expanding in all directions at the same rate