Learn how we know the Earth is round, and the science behind the shape of our gravitational field.

According to the patent, habitable modules would rotate around a central axis to simulate gravity for crew by producing an outward-pushing centrifugal force.

Ever wondered why people on the 'bottom' of Earth don't fall off? It's all thanks to gravity, a powerful force pulling ...

When humanity first started studying motion, circles posed a peculiar puzzle. Why do planets sweep endlessly around the Sun without flying off into the void of space? Why does a stone swung on a ...

One of the oldest unsolved riddles in planetary science concerns the origin of the moon. Over a century ago, George Darwin ...