5 STASHED IDEAS
Human survival on Mars would require living in artificial Mars habitats with complex life-support systems. One key aspect of this would be water processing systems.
Being made mainly of water, a human being would die in a matter of days without it.
An object in motion will stay in motion unless something pushes or pulls on it.
This statement is called Newton's first law of motion.
Without gravity, an Earth-orbiting satellite would go off into space along a straight line. With gravity, it is pulled back toward Earth.
Objects in space give off a variety of electromagnetic waves, such as light waves, radio waves and X-rays.
A radio telescope detects radio waves coming from space. It can also detect quasars and other objects that cannot be seen with an optical telescope (one that collects light waves).
A radio telescope has a large dish aerial that collects radio waves and bounces them into a receiver, which converts them into electrical signals.
Giotto photographed jets of gas spouting from the black surface of the comet's nucleus.
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