Moon. The moon is about 1/80th the size of the Earth in mass.

Interstellar. Interstellar space travel is unmanned or manned travel between stars.

Momentum. Momentum is conserved in all collision systems.

Sea. A sea is partially surrounded by land.

Timebase Corrector. Time base correction is used to reduce or eliminate mechanical errors in analog recordings.

1/6 That Of The Earth. A 220 pound person on Earth would register about 37.5 pounds on a scale on the moon.