A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Every year, the moon moves just a little farther away from our planet. Scientists have calculated the rate at which our ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

(That star, Proxima Centauri, is 4.25 light-years away.) The fourth one ... At about 100 times that distance, the optical gleam of Earth’s city lights would fade to black—better but still ...

It may seem like a question with a simple answer: How far away is the moon? But the distance between Earth and our closest neighbor is more nuanced than a single number. "The commonly quoted ...

NASA engineers have revived old thrusters on Voyager 1 to prevent a clog from endangering the mission during a planned ...