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escape velocity

Escape Velocity 1
Image: NASA

Escape Velocity 1

You might not think you're trapped in a well, but you are. The mass of the Earth creates a “gravity well,” and the only way to climb out completely is to reach our planet’s escape velocity: about 7 miles/second (11 km/s).

But that’s nothing. The escape velocity of the Sun is about 600 kilometers a second. Find out how it works and what it actually takes to for spacecraft to attain Earth's escape velocity.

Physics from Nothing
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Shoot a Cannonball into Orbit!

Shoot a Cannonball into Orbit!

Fire away! Isaac Newton’s imaginary cannon will show you the difference between escape velocity and slower velocities that put something into orbit. More...

Game
NASA
Mars Facts

Mars Facts

The escape velocity for Mars is less than half what it is for Earth and even Venus. Find out why. More...

Article
NASA
Escape Velocity & Black Holes

Escape Velocity & Black Holes

Imagine something so massive its escape velocity is the speed of light. That’s a black hole. Nothing can get out from inside it, and time seems to stop at its border. More...

Article
New Mexico State University
Escape Velocity 2

Escape Velocity 2

Here’s how to calculate the escape velocity of the Earth, the Moon, or any object. Don't worry, Kat and Chiara walk you through all the math. More...

Video
Physics from Nothing
What Is Orbit?

What Is Orbit?

The speed a object needs to stay in orbit isn't the same as what it takes to break free from a planet's gravity. Explore the differences between escape and orbital velocity. More...

Article
NASA
Escape Velocity Interactive

Escape Velocity Interactive

For true math lovers, here's help in figuring out the escape velocity for the Moon, Pluto, and all the planets in our solar system. More...

Interactive
HyperPhysics
Escape Velocity Interactive Quiz

Escape Velocity Interactive Quiz

This quiz challenges you to work out escape velocities from the Earth, a moon of Jupiter, even the Sun. More...

Interactive
McGraw-Hill
Gravitational Escape Velocity with Saturn V Rocket

Gravitational Escape Velocity with Saturn V Rocket

The escape velocity from the Earth's surface is about 11 kilometers per second, but NASA's famous Saturn V rockets never reached it. So how did they get to the Moon? More...

Article
School for Champions
What Is Escape Velocity?

What Is Escape Velocity?

Explore escape velocity and find out how spacecraft navigate well from one gravity to another. More...

Article
Northwestern University

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