Exam 22: Motions in the Heavens

When the Moon passes directly between the Earth and the Sun, a/an __________ __________ occurs.

In the __________, only a portion of the Sun is eclipsed.

The dipper is a __________ in Earth's night sky.

The Pole Star is a __________ point in the sky.

Planets show sometimes __________ motion with respect to the stars.

In the Northern Hemisphere, the Pole Star:

The movement of planets in orbits rather than flying off into space in straight lines was first explained by:

Right after full moon, the Moon goes into the __________ phase.

The Moon does not emit its own light; it reflects light from __________.

Aristotle proposed a __________ Universe.

Astronomers discovered the element helium in the Sun 27 years before it was discovered on Earth.

Constellations as observed from Earth do not change with the seasons.

As light passes from the hot interior of a star through the cooler outer layers:

The Moon does not emit its own light; it reflects light from the Earth.

The geocentric Universe easily explains retrograde motion.

Copernicus was the first to propose a __________ Universe.

In the geocentric Universe, a series of concentric __________ __________ made of transparent crystal surround the Earth.

The frequency of light waves:

A/an __________ __________ uses a curved mirror to collect light and focus an image.

The constellation Orion is visible from North America during winter but is not seen on summer evenings. Which of the following statements is true?