Mars Trivia Questions, Answers, and Fun Facts
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Related Topics
Black Holes
Where gravity is so strong that not even light can escape.
The Moon
Footprints there will last 100 million years, because there's no wind to blow them away.
The Visible Universe
93 billion light-years across, two trillion galaxies, and expanding faster than light.
The Milky Way Galaxy
Our home galaxy: 100,000 light-years across, hundreds of billions of stars, and a supermassive black hole at its heart.