Archives: Glossary Terms: 691 terms

A type of Newtonian reflector, made popular by amateur astronomer John Dobson, that uses a simple but highly effective wooden ...

The apparent change in wavelength of sound or light emitted by an object in relation to an observer's position. An ...

Two asteroids that revolve around each other and are held together by the gravity between them. Also called a binary ...

A grouping of two stars. This grouping can be apparent, where the stars seem close together, or physical, such as ...

Two stars that lie very close to, and are often orbiting, each other. Line-of-sight doubles are a consequence of perspective ...

Signal received from a spacecraft.

Deep Space Communications Complex, one of three DSN tracking sites at Goldstone, California; Madrid, Spain; and Canberra, Australia; spaced about ...

Deep Space Mission System, the system of computers, software, networks, and procedures that processes data from the DSN at JPL.

Deep Space Network, NASA's worldwide spacecraft tracking facility managed and operated by JPL.

Data System Operations Team, part of the DSMS staff.