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Glossary

D

DAAC

Distributed Active Archive Center

DAP

Data Analysis Program associated with a mission. There are many variants e.g., CDAP (Cassini Data Analysis Program), DDAP (Discovery Data Analysis Program), etc.

dark matter

Nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects.


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dewar

A glass or metal container made like a vacuum bottle that is used especially for storing liquefied gases.


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DoD

Department of Defense

DOE

Department of Energy

DSN

Deep Space Network

dynamical fluid

a fluid whose state is determined by conditions around it