References

Reference Most asteroids orbit between Mars and Jupiter in the main asteroid belt. But some space rocks stray out of the main belt and threaten Earth.

As 'The War Between the Land and the Sea' rages on, we look back at the previous TV shows to explode out of the Whoniverse.

Reference The summer solstice marks the start of astronomical summer and the longest day of the year. Here we explore when the summer solstice occurs and why.

Reference Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).

Reference Winter Solstice has long marked a time of rebirth, behind it are fascinating astronomical events.

Reference This low-key meteor shower is well worth a watch.

Reference Your guide to January’s full Wolf Moon, from peak times to skywatching highlights.

Ahead of Terminator 2D: NO FATE, we're going back in time to find some Terminator games that don't suck. Don't worry, we'll be back!

'Apollo 1: Destination Moon' follows a real-life astronaut mission that ended tragically — and the lessons learned for future Apollo missions.

Reference The Geminid meteor shower peaks the night of Dec. 13-14. Our guide tells you where and how to see them.