Exam 22: Motions in the Heavens

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

Why will Polaris no longer be the North Star in a few thousand years?

In the visible portion of the electromagnetic spectrum, colors represent different ____________________ of light.

Describe Ptolemy's model.

Isaac Newton was able to explain why ____.

Right after a full moon, the Moon goes into the ____ phase.

What kind of information does emission and absorption spectra provide?

The outer atmosphere of the Sun is called the ____.

What term best describes the motion of orbiting around a central point?

Aristotle believed that the Sun, Moon, planets, and stars must be unblemished spheres because the gods would only create perfection.

____________________ is the capability of distinguishing individual parts, such as the ability of an optical telescope to distinguish details.

Measuring the red shift or blue shift of light from a star allows astronomers to calculate the ____ of that star.

____ telescopes use two lenses: one to collect light from a distant object and another to magnify the image.

Galileo observed that the planet ____ passes through phases as the Moon does, an occurrence that could not be explained by the geocentric model.

What is Newton's first law of motion?

An object moves in a straight line unless acted on by an outside force.

Aristotle proposed a heliocentric Universe.

Describe Copernicus' contributions to astronomy and his beliefs on Ptolemy's model.

In Aristotle's model, a hypothetical series of concentric celestial ____ surround Earth.

A(n) ____________________ is a device that collects light from a wide area and then focuses it where it can be detected.