Planet Comparison Table

How do we know about planets as far away from Earth as Neptune?

Which planet rotates in the opposite direction of most other planets?

Which of the following properties of Earth help make it "just right" for life?

Why is Saturn's period of revolution longer than Earth's?

What is the Great Red Spot on Jupiter?

What is the current astronomical status of Pluto?

Which of these is NOT a difference in the Inner Planets & Outer Planets?

What is the hottest planet?

What force holds planets in orbit around the sun?

Why isn't Mercury the hottest planet?

What planet is the next goal of NASA's space program?

Which planet has virtually no atmosphere so almost all gases escape into space?

Why do Mars & Earth have seasons?

Which planet has the most moons that we currently know of?

Which planet has 2 moons, Phobos and Deimos?

Which planet is NOT made primarily of hydrogen & helium gases?

Which planet rotates North to South rather than East to West or West to East?

Which planet had a Great Dark Spot that didn't last long?

Why would a human be crushed on Venus?

Which gas makes up most of Earth's atmosphere?

Olympic Mons, the tallest volcano in the Solar System, is located on which planet?

Which of the following is important for life to exist on Earth?

Why is Venus called Earth's twin?

Why isn't the water on Mars beneficial to the existence of life?

Mars' atmosphere is what percent carbon dioxide?