If you've been outside the last night or two and noticed a star moving suspiciously fast, congratulations, you just saw the ...

When I was standing at the South Pole, I felt the same way I feel anywhere on Earth because my feet were still on the ground and the sky was still overhead. I’m an astrophysicist from Wisconsin who ...

A powerful burst of energy from the sun streaming past Earth painted the night sky as far south as Florida with stunning northern lights displays overnight Tuesday. The dancing red and green and ...

Star trails are the visible imprint of Earth's rotation. As our planet spins around its axis, the stars appear to sweep ...