Here's an odd thing about weightlessness: if it were possible to live in the center of the earth we would be weightless there, too!
Why are the planets where they are instead of somewhere else?
The next time you long for the romance of the northern lights, switch on a fluorescent lamp! There may be less mystique, but the principle will be the same.
Did astronauts Jack Lousma and C. Gordon Fullerton see a ghost aboard their shuttle back in 1982? Find out on this Moment of Science.
The relatively small Earth, with its sizable moon, is the only planet we know of with life on it. Coincidence?
What happens to a comet after it's exciting entrance into our orbit?
How can scientist know so much about the sun's heliosheath without being able to go there?
Similar physics that governs our solar system can be seen in your own kitchen sink!
Solar winds create a bubble that cover our entire solar system! Scientists call this the sun's heliosphere.
Unless a flying saucer beams you up from your backyard, detecting alien life is tricky business.