Rocket Men: The Daring Odyssey of Apollo 8 and the Astronauts Who Made Man's First Journey to the Moon

by Robert Kurson

The Moon’s gravitational pull on Earth is equally important; without it, Earth would wobble on its axis and lose its moderate climate. Summer temperatures could exceed 200 degrees Fahrenheit. Much of Earth could sink beneath water. Spinning faster without the Moon’s grip, Earth days might last just eight hours, winds would reach hurricane strengths, and life would be difficult, if not impossible.