If you wipe a finger across a household surface that hasn't been cleaned in the last few days, chances are you'll come into contact with dust.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Where did our planets come from?
You've probably seen cobwebs around your home and wondered where they come from...
Some clouds appear light and fluffy. Others dark and menacing. But are all clouds made of bacteria?
NASA is planning to send astronauts back to the moon fairly soon. However, there are a few kinks to work out, like what to do about moon dust.
In 1987 an asteroid measuring a half a mile in diameter came by, missing our planet by a measly six orbital hours. Learn more on this Moment of Science.
Why do your eyes get puffy when you cry? Find out on this Moment of Science.
Now, at sunset, the lowest mile or so of the atmosphere is filled with things like vehicle exhaust, dust, smoke, and water vapor, and all these pollutants scatter light.