What does the Earth revolve around in a heliocentric system?
The Sun
Who discovered that each planet's order is an ellipse?
Kepler/Brahe
How does the sun produce energy?
Nuclear Fusion
What layer are you looking at when you look at an image of the sun?
Photosphere
What do the four outer planets have in common?
They are much larger then Earth and are made of mainly hydrogen and helium
What do all the inner planets have in common?
They all are small and have rocked surfaces
How are Venus and Earth alike?
Similar Size and Density
What is the smallest terrestrial planet?
Mercury
What are Saturn's rings mostly made up of?
Chunks of ice and rock
What makes Uranus different from the other planets?
Rotates on its side
Between what two planets if the asteroid belt located?
Mars and Jupiter
What is distinctive about Jupiter?
Largest and most massive planets
What was the Earth center model called?
geocentric
What consists of 8 planets, their moons, and several kinds of smaller objects?
Our Solar System
What is the middle layer of the sun's atmosphere?
Chromosphere
