Universe & Space
This planet has the longest year.
What is Neptune?
This force keeps planets moving in orbit around the Sun.
What is gravity?
According to the Big Bang Theory, the universe is doing this.
What is expanding?
This force is similar to the tension in a string when an object moves in a circular path.
What is gravitational force?
This structure contains billions of solar systems, including ours.
What is the Milky Way galaxy?
You would weigh the most on this planet.
What is Jupiter?
These rocky objects orbit the Sun and are mostly found between Mars and Jupiter.
What are asteroids?
This massive object’s gravity keeps the planets in orbit.
What is the Sun?
Venus is hotter than Mercury because of this atmospheric effect that traps heat.
What is the greenhouse effect?
This object has the strongest gravitational pull in our solar system.
What is the Sun?