Archives: Glossary Terms: 691 terms

Orbit Trim Maneuver, spacecraft propulsive maneuver.

One-Way Light Time, elapsed time between Earth and spacecraft or solar system body.

A part of Earth's atmosphere that absorbs lots of the sun's ultraviolet radiation. It is made of a gas called ...

A quantity of data used as the basis for multiplexing, for example in accordance with CCSDS.

Payload Assist Module upper stage.

The apparent change in position of two objects viewed from different locations.

Circles in parallel planes to that of the equator defining north-south measurements, also called lines of latitude.

A parhelic circle is a rare optical atmospheric phenomenon.

A large distance often used in astronomy. A parsec is equal to 3.26 light-years.

A tiny amount or small piece of something.