DSS
Deep Space Station, the antenna and front-end equipment at DSCCs.
Dusk generally refers to the transition from day to night. Scientists distinguish between three definitions of dusk civil, nautical, and ...
A celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but has not ...
A unit of force equal to the force required to accelerate a 1-g mass 1 cm per second per second. ...
Earthshine is a dull glow which sometimes lights up the unlit part of the Moon. It usually occurs a few ...
The distance between the foci of an ellipse divided by the major axis.
An event that occurs when the shadow of a planet or moon falls upon a second body. A solar eclipse ...
A binary system where one object passes in front of the other, cutting off some or all of its light.
An imaginary line in the sky traced by the Sun as it moves in its yearly path through the sky.