The moon's ascending node (the point in the sky where its orbit crosses the ecliptic from south to north) is moving westward ...

Visible below Jupiter and rising into view in the east as the sky darkens, the red planet appears to give off a golden glow for the rest of the night as it moves into the southern sky. Why is Mars ...

Did you spot beams of light streaming down from the sky early Tuesday morning ... effects from a science fiction movie, are actually a natural phenomenon that occurs worldwide.

It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something called the Rayleigh effect, or Rayleigh scattering. But that same ...