An asteroid will whiz by Earth at 29,000 miles per hour. That could cause a big impact, but do we really have anything to worry about?
How can you tell how far away stars, planets, and comets are without modern instruments?
LEGO? Really? Yes, LEGO is being used as a model for an upcoming asteroid landing.
Water is pretty incredible. Oceans cover 70% of the planet and our bodies are something like 60% water. Where did all this water come from?
For a long time people have been fascinated by comets passing by the earth. How close are they? Learn more on this Moment of Science.
What's as light as smoke but strong as a brick? Find out on this Moment of Science.