Janets Planet Videos

Sir Isaac Newton

The apple never falls far from the tree...and that's how Isaac Newton discovered gravity!

Sir Isaac Newton

Galileo

Wait, the Earth revolves around the SUN? Yes, but before Galileo, no one believed that!

Galileo

Gravitational Force

Gravity works in strange ways, and Janet begins to get to the bottom of it all.

Gravitational Force

Parabolas and Weightlessness

What does it feel like to float in outerspace? Astronauts experience microgravity by training in very special airplanes.

Parabolas and Weightlessness

What Happens in Microgravity

How does gravity behave when we get down to the real nitty gritty?

What Happens in Microgravity

Henry Cavendish

Henry Cavendish was the first scientist to test gravity in the laboratory. Thanks to the "Cavendish Experiment," we know how much Earth weighs!

Henry Cavendish

Intro

Meet Janet. She'll be your tourguide through this crazy universe of ours! Don't worry...there's no spacesuit required.

Intro

Microgravity and Astronauts

What effect does microgravity have on astronauts orbiting earth?

Microgravity and Astronauts

Summary

Janet wraps it all up. What did you learn about microgravity?

Summary

Weight and Mass

Two of the key elements of physics, an object's weight and mass determine how it's affected by gravity.

Weight and Mass

What If There Were No Gravity

It's a fair question, right? Would we be walking on ceilings? Or would our entire universe change?

What If There Were No Gravity

What is Gravity?

Why aren't we floating right now? Gravity, of course! But it's not that simple...

What is Gravity?

What Is Microgravity?

So we know about GRAVITY, but what exactly is MICROGRAVITY?

What Is Microgravity?