IVOAT Thesaurus

  1. R association
  2. R Canis Majoris star
  3. R CMa star USE R Canis Majoris star
  4. R Cor Bor star USE R Coronae Borealis star
  5. R Coronae Borealis star
  6. R magnitude
  7. r process USE r-process
  8. R star
  9. R-association USE R association
  10. r-process
  11. Ra USE radium
  12. radar
  13. radar astronomy
  14. radar equipment
  15. radar mapping
  16. radar telescope
  17. radial pulsation
  18. radial velocity
  19. radiant meteor
  20. radiant moving cluster
  21. radiation
  22. radiation background USE background radiation
  23. radiation belt
  24. radiation damping
  25. radiation field
  26. radiation mechanism
  27. radiation pressure
  28. radiation scattering
  29. radiative braking
  30. radiative capture USE radiative recombination
  31. radiative equilibrium
  32. radiative recombination
  33. radiative transfer
  34. radical
  35. radio absorption
  36. radio antenna
  37. radio antennas USE radio antenna
  38. radio astrometry
  39. radio astronomy
  40. radio background
  41. radio burst
  42. radio core
  43. radio emission
  44. radio flare
  45. radio frequency
  46. radio frequency interference USE radio background
  47. radio frequency interference USE radio interference
  48. radio galaxy
  49. radio interference
  50. radio interferometer
  51. radio interferometry
  52. radio jet
  53. radio noise USE radio background
  54. radio noise USE radio interference
  55. radio observatory
  56. radio occultation
  57. radio pulsar
  58. radio quiet quasar
  59. radio radiation
  60. radio recombination line
  61. radio source
  62. radio source catalog
  63. radio source count
  64. radio spectrograph
  65. radio spectrometer USE radio spectrograph
  66. radio spectroscopy
  67. radio spectrum
  68. radio star
  69. radio structure
  70. radio telescope
  71. radio transmission window
  72. radio wave USE radio radiation
  73. radio waveguide
  74. radioactive decay
  75. radioactivity
  76. radioheliograph
  77. radiometer
  78. radiometry
  79. radium
  80. radius luminosity relation USE radius-luminosity relation
  81. radius-luminosity relation
  82. radon
  83. RAID array
  84. Raman effect
  85. Raman scattering
  86. Raman spectroscopy
  87. Raman spectrum
  88. Ramsden eyepiece
  89. range finder
  90. Rankine-Hugoniot relation
  91. rapid burst
  92. rapid oscillation
  93. rare earth
  94. ratio
  95. ray
  96. Rayleigh
  97. Rayleigh criterion
  98. Rayleigh limit USE Rayleigh criterion
  99. Rayleigh limit
  100. Rayleigh number
  101. Rayleigh scattering
  102. Rayleigh-Taylor instability
  103. Razin effect
  104. Rb USE rubidium
  105. RC USE Ritchey-Chretien telescope
  106. RCB star USE R Coronae Borealis star
  107. Re USE rhenium
  108. read out noise
  109. real anomaly
  110. receiver
  111. recombination
  112. recombination line
  113. recurrent nova
  114. red bump USE red giant bump
  115. red clump USE red giant clump
  116. red dwarf
  117. red dwarf flare star
  118. red giant
  119. red giant branch USE giant branch
  120. red giant bump
  121. red giant clump
  122. red giant tip
  123. red shift USE redshift
  124. red star
  125. red supergiant
  126. red-green-blue photometry USE rgb photometry
  127. reddened star
  128. reddening
  129. reddening law
  130. redshift
  131. redshift distance relation
  132. redshift magnitude relation
  133. reduction method
  134. reference frame
  135. reference system
  136. reflecting telescope
  137. reflection
  138. reflection grating
  139. reflection nebula
  140. reflector USE reflecting telescope
  141. reflector antenna
  142. reflector antennas USE reflector antenna
  143. refracting telescope
  144. refraction
  145. refraction angle
  146. refractive index
  147. regression of node
  148. relative sunspot number USE sunspot number
  149. relativistic astrophysics
  150. relativistic cosmology
  151. relativistic disk
  152. relativistic effect
  153. relativistic electron
  154. relativistic fluid dynamics
  155. relativistic gas USE relativistic plasma
  156. relativistic mechanics
  157. relativistic particle
  158. relativistic plasma
  159. relativistic star
  160. relativistic velocity
  161. relativity
  162. relaxation time
  163. remote control system
  164. remote sensing
  165. research
  166. reseaux
  167. residual intensity
  168. resolution
  169. resonance gap
  170. resonance line
  171. retardation
  172. reticle
  173. reticon array
  174. retinal adaption USE dark adaption
  175. reversing layer USE photosphere
  176. Rf USE rutherfordium
  177. Rg USE roentgenium
  178. RGB USE giant branch
  179. rgb photometry
  180. RGB tip distance
  181. rgu photometry
  182. Rh USE rhodium
  183. rhenium
  184. rho Cas star USE rho Cassiopeiae star
  185. rho Cassiopeiae star
  186. rhodium
  187. Right Ascension
  188. rigid body rotation
  189. rill
  190. ring
  191. ring division
  192. ring galaxy
  193. ring nebula
  194. Ritchey-Chretien telescope
  195. Rn USE radon
  196. robotic telescope USE automated telescope
  197. Roche limit
  198. Roche lobe
  199. rocket borne instrument USE rocket-borne instrument
  200. rocket-borne instrument