IVOAT Thesaurus

  1. P USE phosphorus
  2. p branch
  3. P Cygni line profile
  4. P Cygni star USE S Doradus star
  5. P magnitude
  6. p process
  7. Pa USE protactinium
  8. pair annihilation
  9. pair production
  10. paleomagnetism
  11. palladium
  12. parabolic antenna
  13. parabolic antennas USE parabolic antenna
  14. parabolic mirror
  15. parabolic orbit
  16. parabolic reflector
  17. parabolic velocity
  18. parahydrogen
  19. parallax USE annual parallax
  20. parallax
  21. parallax second USE parsec
  22. parallel computer
  23. parametric amplifier
  24. parsec
  25. partial eclipse
  26. particle
  27. particle acceleration
  28. particle accretion
  29. particle beam
  30. particle creation
  31. particle escape
  32. particle interaction
  33. particle production
  34. particle propagation
  35. Paschen line USE Paschen series
  36. Paschen series
  37. Paschen-Back effect
  38. past light cone
  39. Paul trap
  40. Pb USE lead
  41. Pd USE palladium
  42. peculiar A star USE Ap star
  43. peculiar galaxy
  44. peculiar giant
  45. peculiar motion
  46. peculiar object
  47. peculiar star
  48. peculiar variable star
  49. peculiar velocity
  50. pencil beam
  51. pendulum
  52. Penrose process
  53. penumbra
  54. penumbral filament
  55. penumbras USE penumbra
  56. periapsis
  57. periastron
  58. pericenter
  59. perigee
  60. perihelion
  61. period
  62. period age relation USE period-age relation
  63. period change
  64. period color relation USE period-color relation
  65. period density relation USE period-density relation
  66. period determination
  67. period luminosity color relation USE period-luminosity-color relation
  68. period luminosity relation USE period-luminosity relation
  69. period mass relation USE period-mass relation
  70. period radius relation USE period-radius relation
  71. period spectrum relation USE period-spectrum relation
  72. period variation USE period change
  73. period-age relation
  74. period-color relation
  75. period-density relation
  76. period-luminosity relation
  77. period-luminosity-color relation
  78. period-mass relation
  79. period-radius relation
  80. period-spectrum relation
  81. periodic comet
  82. periodic orbit
  83. periodic variable star
  84. peripheral
  85. perturbation
  86. perturbation theory
  87. petrology
  88. Pfund series
  89. PG1159 star
  90. PG1159-35 star USE PG1159 star
  91. phase angle
  92. phase defect
  93. phase difference
  94. phase effect
  95. phase error
  96. phase function
  97. phase Moon USE lunar phase
  98. phase rotator
  99. phase sensitive detector
  100. phase shift
  101. phase space
  102. phase switching
  103. phase switching interferometer
  104. phase wave
  105. phase-shift USE phase shift
  106. phased array
  107. Phillips band
  108. phosphorescence
  109. phosphorescent scintillation
  110. phosphorus
  111. photocathode
  112. photocell USE photomultiplier tube
  113. photochemistry
  114. photoconductive cell
  115. photodiode
  116. photodissociation
  117. photoelectric cell USE photomultiplier tube
  118. photoelectric image tube USE image tube
  119. photoelectric instrument
  120. photoelectric magnitude
  121. photoelectric photometer
  122. photoelectric photometry
  123. photoelectronic device
  124. photogrammetry
  125. photograph
  126. photographic astrometry
  127. photographic developer
  128. photographic emulsion
  129. photographic film
  130. photographic filter
  131. photographic instrument
  132. photographic magnitude
  133. photographic material
  134. photographic photometry
  135. photographic plate
  136. photographic processing
  137. photographic zenith tube USE zenith tube
  138. photography
  139. photoheliograph
  140. photoionisation UK USE photoionization
  141. photoionization
  142. photoluminescence
  143. photometer
  144. photometric binary star USE eclipsing binary star
  145. photometric binary star USE ellipsoidal variable star
  146. photometric element
  147. photometric parallax
  148. photometric standard star
  149. photometric system
  150. photometry
  151. photomultiplier tube
  152. photon
  153. photon counting system
  154. photosphere
  155. photovisual magnitude
  156. photovoltaic cell
  157. physical constant
  158. physical libration USE libration
  159. picture element USE pixel
  160. pion
  161. pitch angle
  162. pixel
  163. PL relation USE period-luminosity relation
  164. plage
  165. Planck black body formula
  166. Planck constant
  167. plane polarisation UK USE plane polarization
  168. plane polarization
  169. planet
  170. planet satellite
  171. planetar
  172. planetarium
  173. planetary
  174. planetary alignment
  175. planetary microlensing
  176. planetary nebula
  177. planetary ring
  178. planetary system
  179. planetary theory
  180. planetesimal
  181. planetoid USE asteroid
  182. planetology
  183. plasma
  184. plasma cloud
  185. plasma jet
  186. plasma loop
  187. plasma physics
  188. plasma wave
  189. plasmapause
  190. platinum
  191. PLC relation USE period-luminosity-color relation
  192. Pluto
  193. plutonium
  194. Pm USE promethium
  195. Po USE polonium
  196. Pogson scale
  197. Poincare theorem
  198. point spread function
  199. pointing accuracy
  200. pointing error