Exam 22: Motions in the Heavens

Normally, the Moon lies out of the plane of the Earth's orbit around the Sun.

The Doppler effect causes light from an object moving away from Earth to reach us at a lower frequency than it had when it was emitted.

The __________ of the Sun appears as a halo around the Moon during a solar eclipse.

Aristotle proposed a __________ Universe.

Newton recognized that __________ holds the planets in their orbits around the Sun.

If a star is moving away from Earth, the Doppler effect will cause the frequency of the star's light to shift to a __________ frequency, causing a __________ shift.

The model that we use today to describe the motion of the heavenly bodies:

If we knew that the Sun rose every morning in the east and set every evening in the west, approximately 12 hours later, but we had no other information, which of the following conclusions would be reasonable?

Planets sometimes appear to reverse direction in the night sky and drift westward.

More than 99.99 percent of the spectrum is visible to the naked eye.

In Aristotle's model, celestial __________ surround Earth.

The __________ is the narrow band on Earth where the Sun is completely blocked out during a solar eclipse.

When the Moon passes directly between the Earth and Sun, it produces a/an:

For each complete orbit around the Sun, the Earth spins approximately __________ times.

Ptolemy modified the celestial sphere model to incorporate __________ __________.

__________ was the first person to see that the Moon had mountains, hills, craters, and large plains.

__________ are celestial bodies that revolve around stars.

Kepler calculated that the planets move in:

Newton was the first person to recognize that gravity was a universal force.

A Doppler shift to a lower frequency is called a __________ shift.