History of Astronomers quiz

Ptolemy’s model of the solar system was called the ______ theory.

Geocentric

In Greek, “geo” means ______

Earth

Copernicus found evidence that the ______ revolves around the ______.

Earth revolves around the Sun

This is known as the ______ theory.

Heliocentric

Copernicus also found that the Earth rotates to cause ______.

Day and night

Another discovery of Copernicus was that the Earth revolves around the Sun to cause ______.

A year

Which planet did Galileo discover has phases like the Moon?

Venus

Johannes Kepler was an assistant to ______.

Tycho Brahe

The tendency of a moving object to continue in a straight line—or a stationary object to remain at rest—is called _____

Inertia

What system did Ptolemy believe in?

A geocentric (earth-centered)

Why did many people accept the geocentric model?

The sun, moon, and stars appear to circle earth

What model did Copernicus support?

Heliocentric (Sun-centered)

According to Copernicus, what causes day and night?

Earth’s rotation

According to Copernicus, what causes the seasons?

Earth’s revolution around the sun

What shape did Kepler find for planetary orbits?

Ellipses

What did Galileo see on the Moon?

Surface features like mountains and craters

How many moons of Jupiter did Galileo observe?

Four

What force explains falling objects and planetary orbits, per Newton?

Gravity

What improvement did Newton make to telescopes?

Invented a reflecting telescope using mirrors