The space shuttle was the first spacecraft designed to be reused.

Salyut 1 was the first space station.

Jonathan Goble was the first Baptist missionary to Japan.

The first American in space was Alan Shepard.

California was the thirty-first state to join the union.

Robert H. Goddard launched the first liquid-fuel rocket.

Another kind of telescope is the radio telescope, which receives radio signals from outer space that help it create stellar maps and images.

There are two kinds of telescopes: reflecting telescopes and refracting telescopes. The first uses mirrors, while the latter uses lenses.

Light travels at 186,000 miles per second.

Noah Webster wrote the first major American dictionary.