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Physics Facts

Can You Miss the Earth?

Have you ever wondered why astronauts float in space? Well, it isn't because there is no gravity in space. Astronauts float because they are in constant free fall. If a baseball pitcher throws a ... Continue reading

Astronaut in free fall

The Physics of Sandcastles

Give a plastic bucket and a shovel to a child, then turn her loose on a beach full of sand. She'll happily toil the day away building the sandcastle to end all sandcastles. It's pure fun. It's also ... Continue reading

So much going on in a grain of sand.

Does Earth Have Its Own Neon Sign?

You might wonder what the Northern Lights and neon signs have in common. Actually, a lot! What makes luminous colors shimmer across the Northern sky? The answer is in the Sun. Charged particles ... Continue reading

Northern Lights

Sonic Boom

They sound like thunder, but they're not. They're sonic booms, concentrated blasts of sound waves created as vehicles travel faster than the speed of sound. To understand how the booms are created, ... Continue reading