IVOAT Thesaurus

  1. A dwarf
  2. A giant
  3. A star
  4. A subdwarf
  5. A subgiant
  6. A supergiant
  7. A.U. USE Astronomical Unit
  8. AB variable star USE Bailey type
  9. Abell cluster
  10. aberration
  11. aberration USE optical aberration
  12. ablation
  13. abnormal spectrum
  14. absolute magnitude
  15. absolute temperature scale
  16. absorption
  17. absorption coefficient
  18. absorption line
  19. absorption line system
  20. absorption nebula USE dark nebula
  21. absorption spectroscopy
  22. absorption spectrum
  23. absorptivity USE absorption coefficient
  24. abundance
  25. abundance ratio
  26. Ac USE actinium
  27. acceleration
  28. acceleration of gravity USE gravity
  29. acceleration of gravity USE surface gravity
  30. accretion
  31. accretion disk
  32. achondrite
  33. acoustic wave
  34. acoustics
  35. actinium
  36. active galactic nucleus
  37. active galaxy
  38. active optics
  39. active prominence
  40. active region
  41. active star
  42. active Sun
  43. activity index
  44. adaption
  45. adaptive optics
  46. adiabatic process
  47. adjustment
  48. adsorption
  49. Ae star
  50. aerials USE antenna
  51. aerolite
  52. aeronomy
  53. afterglow
  54. Ag USE silver
  55. AGB USE asymptotic giant branch
  56. age
  57. AGN USE active galactic nucleus
  58. AI Velorum star USE delta Scuti star
  59. air
  60. air conditioning
  61. air pollution
  62. air shower USE cosmic ray shower
  63. airglow
  64. airplane borne instrument USE airplane-borne instrument
  65. airplane-borne instrument
  66. Airy disk
  67. Al USE aluminum
  68. albedo
  69. Alfven surface
  70. Alfven wave
  71. Algol variable star
  72. alignment optics
  73. all sky camera USE all-sky camera
  74. all sky photography USE all-sky photography
  75. all-sky camera
  76. all-sky photography
  77. almanac
  78. alpha particle
  79. alpha2 Canum Venaticorum star
  80. alt-azimuth mounting USE altazimuth mounting
  81. altazimuth mounting
  82. altimeter
  83. altimetry
  84. altitude angle
  85. aluminizing
  86. aluminum
  87. aluminum coating
  88. Am USE americium
  89. AM Canum Venaticorum star
  90. AM Herculis star
  91. Am star
  92. amateur astronomy
  93. americium
  94. ammonia
  95. Amor group
  96. amplifier
  97. amplitude
  98. analog recorder
  99. analysis
  100. ancient astronomy USE archaeoastronomy
  101. anemometer
  102. angle of refraction USE refraction angle
  103. angular coordinate USE spherical coordinate
  104. angular diameter
  105. angular distance USE angular separation
  106. angular momentum
  107. angular resolution
  108. angular separation
  109. angular velocity
  110. anisotropy
  111. annual equation
  112. annual parallax
  113. annular eclipse
  114. anomalistic month
  115. anomalistic year
  116. anomaly
  117. ansa
  118. antapex
  119. antarctic observatory
  120. antenna
  121. antenna design
  122. antennas USE antenna
  123. anthropic principle
  124. anticenter USE Galactic anticenter
  125. antimatter
  126. antimony
  127. antineutrino
  128. antinode
  129. antinucleon
  130. antiparticle
  131. antiproton
  132. antireflection coating
  133. Ap star
  134. apastron
  135. aperiodic comet
  136. aperture
  137. aperture synthesis
  138. apex
  139. aphelion
  140. apocenter
  141. apodisation UK USE apodization
  142. apodization
  143. apogee
  144. Apollo group
  145. apparent anomaly USE orbital anomaly
  146. apparent diameter USE angular diameter
  147. apparent intensity
  148. apparent magnitude
  149. apparent places USE apparent position
  150. apparent position
  151. apparent superluminal motion
  152. apse USE apsis
  153. apsidal motion
  154. apsis
  155. Ar USE argon
  156. arc
  157. archaeoastronomy
  158. area photometry USE surface photometry
  159. argon
  160. arm USE spiral arm
  161. armillary sphere
  162. array
  163. array processor
  164. arsenic
  165. artificial satellite
  166. As USE arsenic
  167. ascending node
  168. ashen light
  169. astatine
  170. asteroid
  171. asteroid belt
  172. asteroid occultation
  173. asteroseismology
  174. astigmatism
  175. astroarchaeology USE archaeoastronomy
  176. astrobiology
  177. astrochemistry USE cosmochemistry
  178. astrodynamics
  179. astrograph
  180. astrographic camera
  181. astrographic catalog
  182. astrographic catalogues UK USE astrographic catalog
  183. astrolabe
  184. astrology
  185. astrometric binary star
  186. astrometric instrument
  187. astrometry
  188. astronomer
  189. astronomical constant
  190. astronomical geodesy
  191. astronomical instrument USE instrument
  192. astronomical optics
  193. astronomical research
  194. astronomical technique
  195. Astronomical Unit
  196. astronomy
  197. astrophotography USE photography
  198. astrophysical jet USE jet
  199. astrophysics
  200. asymptotic giant branch