CRAF
Comet Rendezvous / Asteroid Flyby mission, cancelled.
A bowl-shaped depression formed by the impact of an asteroid or meteoroid. Also the depression around the opening of a ...
The moment when a celestial object crosses the meridian and is thus at its highest above the horizon.
The eyes' transition to night vision, in order to see faint objects. Dark adaptation is rapid during the first 5 ...
A term used to describe matter in the universe that cannot be seen, but can be detected by its gravitational ...
Dawn is the transition from night to day as the sky gets brighter. Scientists distinguish between three definitions of dawn ...
The DSN Downlink Channel Controller, one of which is in each DSN Downlink Channel, DC.