A rocket launched from the surface of the Earth needs to reach a speed of at least 4.9 miles per second in order to get into orbit. This speed is known as the orbital velocity and corresponds to more than 20 times the speed of sound. To escape Earth’s gravity and travel to the Moon or another planet, it would need to go even faster at a speed of 7 miles per second or about 25,000 miles per hour. You’ll look out of this world in these dangly, sweet little rocket stud earrings.