Download Astronomy Study Guide

Last Name: ____________________________ Date:_______________ Per.:_____
Astronomy Study Guide
I.
Geocentric vs. Heliocentric
A. In a heliocentric system, Earth revolves around ________
B. The heliocentric system gained support when Galileo observed that
____________ goes through phases similar to our moon
II.
Solar System
A. The Inner Planets
1. All have ____________ surfaces
2. Are all small but ___________ is the smallest
3. One of the conditions required for life on earth is liquid
_______________
4. Venus and Earth are much alike is Size and __________
5. list the inner planets in order _____________________________
6. list the outer planets in order _____________________________
B. The Outer Planets
1. They are much (smaller, larger) than the earth
2. They are made of _________________ and ______________
3. ___________ is now classified as a dwarf planet
4. Planets don’t go flying out into space because of
_______________
5. __________ is the most massive planet
6. Neptune is similar in size and color to ________________
III.
Other Objects in Our Solar System
A. Asteroids
1. The asteroid belt is located between the planets ______________
and ___________
2. When a meteoroid enters Earth’s atmosphere it is called a
______________
IV.
The Universe and Galaxies
A. The Universe
1. The force that tends to pull together matter in stars is ________
2. The theory that explains the formation of the universe is the ____ ______
B. Our Galaxy
1. A light year is the __________________ light travels in a year.
2. Our galaxy is named the ___________ ________
3. The Milky Way is what shape? _______________
4. Our solar system is located ____________________________ within the
Milky Way