What If the Moon Didn't Exist

HarperCollins 1993 ISBN 0-06-016864-1

What if the Moon Didn’t Exist is a collection of speculative articles about different kind of Earths. They were originally published in Astronomy magazine. Scenarios are:

• Solon – Earth without a Moon
• Lunholm – Moon closer to Earth
• Petiel – Earth with less mass
• Urania – Earth’s axis tilted like that of Uranus
• Granstar – More massive sun
• Antar – Effects if a supernova would explode near Earth
• Cerberon – Star passing through the solar system
• Diablo – Black Hole passing through the Earth
• Seeing the world via infrared
• Effects of ozone layer depletion