Why are letters reversed in a mirror? Try this experiment with pen and paper.
You may notice in a mirror that words are backwards in the reflection, but it's actually more than words that are reversed; it's everything!
How can you tell how far away stars, planets, and comets are without modern instruments?
You may have heard scientists use the term "parallax." Learn what a parallax is and how to calculate one!
A full moon will never be seen during the middle of the day. Learn more on this Moment of Science.
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.