Rotate around a fixed axis to repeat your swing. Vijay Singh got a lot of attention during the FedEx Cup tournaments when he referred to himself as "the greatest putter in the world"—which he ...

When large masses of water are moved from one place to another, this changes the shape of Earth and leads to a phenomenon ...

The planets, equally spaced around the central axis of rotation, mesh with the sun as well as the fixed ring gear, so they orbit as they roll. All the planets are mounted to a single rotating ...

Near and far sides of the moon. The moon orbits the Earth once every 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis. As a result, the moon does not seem ...

This story was updated at 9:40 a.m. E.D.T. on Monday, Sept. 10. Every day, the Earth spins once around its axis, making sunrises and sunsets a daily feature of life on the planet. It has done so ...