Michael Cassutt

When it first appeared, the astronomers named the asteroid Keanu. A Near Earth Object, from a distant constellation, it was headed directly toward our sun. But when we went to meet it, it turned out to be far more than a huge rock hurtling through space... The two teams of astronauts sent to...

Mankind’s first contact with extraterrestrial life led to an incredible revelation. Their last may lead them to extinction. Twenty years have passed since the mysterious Near-Earth Object nicknamed Keanu appeared in the night sky and transported an assortment of humans from all over Earth into...

One of the most elusive and controversial figures in NASA's history, George W. S. Abbey was called "the Dark Lord", "the Godfather", and "UNO" (unidentified NASA official) by those within NASA. Yet Abbey had more influence on human spaceflight than almost anyone in history....

The science fiction epic of our time has arrived.Three years ago, an object one hundred miles across was spotted on a trajectory for Earth's sun. Now, its journey is almost over. As it approaches, two competing manned vehicles race through almost half a million kilometers of space to reach it...