A network of Earth's best clocks will be synchronised with the most accurate one ever sent into space. But the device has a ...

There are roughly 1.1 million debris fragments larger than 0.04 inches and about 40,500 fragments larger than 4 inches in orbit according to the ESA. NASA states that debris can reach speeds of 18,000 ...

From space, a fleet of satellites will ... That's because the moon orbits in the same direction as Earth's rotation, but at 2,300 miles per hour (3,700 kilometers per hour), it travels twice ...