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Physics & Astronomy Facts

Rainbow Ark
Your Own Personal Rainbow?

Did you know that no two people ever see the very same rainbow? It's true. Rainbows are formed when light enters a water droplet, reflects once inside the droplet, and is reflected back to our eyes ...
The Apollo 11 lunar laser ranging retroreflector array.
An Old Science Experiment On The Moon

The most famous thing Neil Armstrong left on the moon 35 years ago is a footprint, a boot-shaped depression in the gray moondust. Millions of people have seen pictures of it, and one day, years from n ...

Aerosol Sprays

Liquid forced through a small orifice under pressure will come out Is a spray of fine droplets, or mist, rather than as a stream, or jet. A 'squirt gun' works the same way, as does the kitchen faucet ...

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