Finally, after almost three days and 240,000 miles of travel, Apollo 8 had arrived in lunar space. The men were now so far from the earth that radio communications, traveling at the speed of light (186,280 miles per second), took two and a half seconds to go from the capsule to Houston and then back to the spacecraft. The ship's speed was over 5,000 miles an hour, and the distance to the moon had shrunk to mere miles. Yet, Borman told the ground, "As a matter of interest, we have as yet to see the moon." Their spacecraft's orientation tail pointing to the moon still prevented them from seeing it.
|
The unseen world that these three men now approached had tantalized humanity across thousands of generations. Civilizations had come and go, each watching the moon wax and wane as its perpetual lunar cycle clocked the passing of the seasons, each culture trying to understand the origin and substance of this glowing silver-white sphere in the sky. The Navajos believed that the First Man and First Woman made the sun and moon to brighten the world with light, and used a slab of quartz crystal to carve the disks, attaching them to the sky with lightning darts. The Greeks, while believing in the moon goddess Selene, also insisted that the moon must be a planet like the earth. "The moon appears to be terrestrial," said Plutarch, "for she is inhabited like the earth . . . and peopled with the greatest living creatures and the fairest plants." Many cultures told of a Man-in-the-Moon, and because new or green cheese resembled the moon, some legends even jibed that maybe that was what constituted the moon. 1
|
With the coming of the telescope, astronomers learned that the moon was truly another world, but airless and almost certainly without life. It had a diameter of 2,160 miles, making it about a quarter the size of earth. In the seventeenth century, astronomer Giovanni Riccioli studied the surface and named many of its most prominent craters and mountain ranges. He also named the large dark areas of the moon mare (pronounced MAR-ray), Latin for "sea" because he thought these regions were either oceans or dried seabeds.
|
Despite centuries of careful astronomical observations, however, no human being had ever seen the moon's far side. Because the moon's day (27.32
|
|