If you've ever glanced skyward, you've probably noticed the sheer numbers of stars. Some are tiny, barely visible points. Others radiate strong white light.
Why is the earth round? Why isn't it a cube or a pyramid?
Learn about 24 Themis, one of the largest known asteroids.
If you've been to a cave, you might think that it's cold underground. Nothing could be further from the truth. Learn more on this Moment of Science.
Beyond our atmosphere flies a lot of debris. Some fragments can be larger than mountains, but most is space-dust.
The startling experience of five British monks from the twelfth century who saw an enormous explosion occur on the moon. The moon still be vibrating today.
How many times have you actually seen a star explode or a asteroid at night? Have ever learned about how the records of these events are taken? Then tune in.
What is the difference between an asteroid and a comet?
Geogenesis is the scientific term for the beginning of something very important, life. How did it all begin?
The first thing you need to survive an asteroid collision is knowledge of when it's coming.