Letter R - Universe dictionary by Futura-Sciences

Alphabetical index

RADARSAT-1 RADARSAT-1 is a sophisticated Earth observation satellite ...	Radial velocity Radial velocity is the velocity of an object in the ...
Radiant The radiant is the spot on the celestial sphere from which ...	Radio telescope A radio telescope is an astronomical instrument for ...
Radiometer A radiometer is a passive receiver that collects emitted ...	Ralph Ralph is an instrument on board the New Horizons probe, it ...
Ramjet engine The ramjet is the simplest type of jet engine and has no ...	Realism A point of view that asserts the reality of the world ...
Red dwarf A red dwarf is the smallest and dimmest of the stars. Around ...	Red giant A large and very bright star that has undergone the ...
Red Spot Junior Red Spot Junior, or Oval BA, is a spot on Jupiter first ...	Redshift Redshift is an increase in the wavelength of light caused by ...
Rhea Rhea (Saturn V) was discovered by Cassini in 1672. Its ...	Rich cluster of galaxies A rich cluster of galaxies is a cluster of galaxies ...
Right ascension Astronomy Right ascension is an equatorial coordinate used ...	Right ascension of a direction The right ascension of a direction for a given date. One of ...
Rings of Saturn Seen from the Earth, the rings of Saturn look like ...	Rosetta The main purpose of the Rosetta probe and its lander Philae ...
Roskosmos Roskosmos is the Russian Space Agency.	Ross, Frank Frank Ross was an astronomer who, between 1925 and 1939, ...