Redshift by Ensign February 20, 2021 0 A shift in the lines of an object's spectrum toward the red end. Redshift indicates that an object is moving ...
Reflection by Ensign February 20, 2021 0 Reflection occurs when light bounces off the surface of an object.
Reflector by Ensign February 20, 2021 0 A telescope that gathers light with a mirror. The Newtonian reflector, designed by Isaac Newton, has a small second mirror ...
Refraction by Ensign February 20, 2021 0 Refraction is the bending of light as it moves from one substance to another. For example, it happens when sunlight ...
Refractor by Ensign February 20, 2021 0 A telescope that gathers light with a lens. The original design showed dramatic rainbows, or 'false color,†around stars and ...
Regular Satellite by Ensign February 20, 2021 0 A satellite that orbits close to a planet in a nearly circular, equatorial orbit. Regular satellites are believed to have ...
REM by Ensign February 20, 2021 0 Receiver Equipment Monitor within the Downlink Channel (DC) of the Downlink Tracking & Telemetry subsystem (DTT).
Resonance by Ensign February 20, 2021 0 A state in which an orbiting object is subject to periodic gravitational perturbations by another.
Retrograde by Ensign February 20, 2021 0 Orbit in which the spacecraft moves in the opposite direction from the planet's rotatation. See prograde.
Retrograde Motion by Ensign February 20, 2021 0 The phenomenon where a celestial body appears to slow down, stop, them move in the opposite direction. This motion is ...
