Day's film plot is about an Earth-based secret zero-gravity test laboratory built to train astronauts.

The Vomit Comet is used to train astronauts.

NASA could have used it to train astronauts how to fight nausea.

The people aboard wouldn't be trained astronauts.

Research in this area is used to train astronauts including the chimpanzees sent into space.

"Space Simulator" is an exterior view of a complicated, boxy machine used to train astronauts in the 1960's.

Airplanes have been used since 1959 to provide a nearly weightless environment in which to train astronauts, conduct research, and film motion pictures.

In some areas, volcanic activity created a landscape so rugged that it was used to train astronauts for lunar excursions.

The United States has agreed to pay Russia $470 million for training American astronauts in the space station over five years.

The footage of Spock's melding with the whales was shot weeks later in a large water tank used to train astronauts for weightlessness.