Which force keeps planets in orbit around the Sun?

What is the main source of energy for the Sun?

Which planet has the strongest gravity in our solar system?

Why do astronauts float inside the International Space Station (ISS)?

What is the speed of light in vacuum approximately?

What protects Earth from harmful solar radiation?

Which celestial body has the weakest gravity?

What causes day and night on Earth?

Which law explains why rockets move forward when gases are expelled backward?

Which planet has the longest day (slowest rotation)?