Intro to Astro

Who proposed the geocentric model of the universe?

• Eratosthenes

• Ptolemy

• Galileo

• Copernicus

Our ___ consists of the Sun and other objects that are held in orbit around the Sun by its gravitational pull on them.

Our solar system belongs to the ___ galaxy.

Copernicus proposed which model of the universe?

• Heliocentrism- the sun is the center of our solar system

• Geocentrism- the Earth is the center of our solar system

• Heliocentrism- the Earth is the center of our solar system

• Geocentrism- the sun is the center of our solar system

Which early astronomer devised a telescope to provide evidence of heliocentrism as the model of our universe?

• Eratosthenes

• Aristotle

• Galileo

• Copernicus

Why was the model of heliocentrism originally rejected?

Who was the first early astronomer to measure the circumference of the Earth?

• Copernicus

• Pythagoras

• Galileo

• Eratosthenes

Which of the following is an inner planet?

• Mars

• Jupiter

• Saturn

• Uranus

Arrange in order of size (large to small): inner planet, outer planet, sun.

Which has longer orbit length?

• Inner planet

• Outer planet