There’s No Specific Boundary Where Space Begins...

The line between space and "not space" is really determined by our atmosphere.

Science There's No Specific Boundary Where Space Begins... The line between space and "not space" is really determined by our atmosphere. Down here on the surface of the planet, it's thick enough to support life. Rising up through the atmosphere, the air gradually gets thinner. READ NOW Advertisement READ THESE Can You Name Each Layer of the Atmosphere? The Most Distant Image Ever Taken of Earth 10 Things Everyone Should Know About the Sun You are receiving this newsletter because you subscribed to the Today I Learned newsletter. If you wish to unsubscribe, please click here A Dotdash Brand 1500 Broadway, 6th Floor, New York, NY, 10036 © 2018 Dotdash - All rights reserved. Privacy Policy.