Who discovered the law of universal gravitation?

What keeps the planets in orbit around the Sun?

Which of the following is a measure of gravitational force on an object?

Why do astronauts feel weightless in space?

Which planet has the strongest gravity in our solar system?

What happens to the gravitational force if the distance between two objects doubles?

What provides the centripetal force that keeps the Moon in orbit around Earth?

If you go to the Moon, your mass will:

What is the acceleration due to gravity on Earth?

Which scientist gave the three laws of planetary motion?