A secretive Space Force ship has returned to earth after spending 434 days in orbit conducting mysterious tests. The Boeing-made X-37B vessel was quietly launched by SpaceX in 2023 from NASA’s ...

Here’s how it works. It may feel like we're standing still, but Earth is moving through space at astonishing speeds. So, how fast is Earth moving around the sun? The answer might surprise you.

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead suggesting giant voids in space are ... deep inside Earth's mantle ...