Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.

Add Yahoo as a preferred source to see more of our stories on Google. Unravel the mind-bending science behind Interstellar's time dilation and see why the film's most puzzling moments finally make ...

Chinese researchers say they have created a new "lunar time ephemeris" that can calculate the time on the Moon and sync it with time on Earth. Currently, there is no agreed-upon time zone on the Moon.

Add Yahoo as a preferred source to see more of our stories on Google. "That's the Pinwheel galaxy," I said. The name is derived from its shape – albeit this pinwheel contains about a trillion stars.

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...