R136 - Multiple or monster?
R136 AA and the central object of the giant H II region NGC 3603 imaged by holographic speckle interferometry
R31 - A massive O + W-R star binary in the Small Magellanic Cloud
R81: P Cygni of the Large Magellanic Cloud
R:136A1 - Superstar or Stellar Cluster
Racing the Moon's Shadow on July 20, 1963
Radar Albedo of Saturn's Rings.
Radar Altimetery Images of Venus HENG-O Region
Radar Altimetry and Polarization Measurements of the Northern Hemisphere of Mars.
Radar Altimetry of the Martian Cratered Highlands
Radar and Meteors: Controversy over the Origin of Meteors in Postwar Astronomy
Radar and optical observations and physical modeling of triple near-Earth Asteroid (136617) 1994 CC
Radar and photometric observations and shape modeling of contact binary near-Earth Asteroid (8567) 1996 HW1
Radar and Radio Observations of Titan
Radar and the DSN
Radar aperture synthesis observations of asteroids
Radar Astrometry of Near-Earth Asteroids
Radar astrometry of near-earth asteroids
Radar Astronomy
Radar Backscatter from the Dark Side of Iapetus