1
The counting backward aloud from an arbitrary starting number to indicate the time remaining before an event or operation, such as the launching of a missile or space vehicle.
2
a vehicle, sometimes carrying people or animals, designed to obtain scientific information from space, planets, etc, and be recovered on returning to earth
3
the portion of a computer console that contains manual controls for regulating computer operations.
4
a small craft used for traveling between the moon's surface and an orbiting spacecraft.
5
a sealed and pressurized suit designed to allow the wearer to leave a pressurized cabin in outer space or at extremely high altitudes within the atmosphere.
6
the platform on which a missile or launch vehicle undergoes final prelaunch checkout and countdown and from which it is launched from the surface of the earth.
7
a device consisting of one or two earphones with a headband for holding them over the ears and with a microphone attached, used for telephone calls or other spoken communication over distance:
8
a similar depression or cavity that forms the opening of a volcano or geyser. The volcanic activity that creates such craters occurs on the surface of the earth as well as a number of other heavenly bodies.
9
a specially prepared, light-reflecting surface on which motion pictures, slides, etc., may be projected.
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