Which planet is known as the Red Planet?

Which planet comes just after Earth in the solar system?

What is the name of the robot NASA sent to Mars in 2021?

What color does Mars appear in the sky?

Which gas is most present in Mars' atmosphere?

What do scientists hope to find on Mars?

Mars has how many moons?

What is the surface of Mars mostly made of?

Which planet is smaller than Earth but bigger than Mercury?

What powers most Mars rovers?