Space Fact #6: How Fast Does It Take to Reach Outer Space?

To get into low Earth orbit—a path in which the forces of motion balance the pull of gravity—a rocket has to attain a speed of about 17,000 miles per hour. To escape the Gravity Well, a vehicle must go about 25,000 miles per hour—33 times the speed of sound. (Daniel Fleisch and Julia Kregenow, A Student’s Guide to the Mathematics of Astronomy)