JANET PETRO: Well, technically, space or outer space is a big void. It's a vacuum that exists beyond Earth. And even though space is a vacuum, it's not empty. Outer space contains...
In 1968, Apollo 8 went to the moon. They didn’t land, but they did circle the moon. I was watching it on television, and at a certain point one of the astronauts casually said, “We’re going to turn...
