| active galactic nucleus | AGN | 485 | 31 | 2.002998 | 0002441,0002313,etc |
| cold dark matter | CDM | 368 | 27 | 2.004782 | 0002249,0002204,etc |
| spectral energy distribution | SED | 153 | 21 | 1.001377 | 0002146,0002436,etc |
| cosmic microwave background | CMB | 317 | 21 | 2.002718 | 0002249,0002281,etc |
| point spread function | PSF | 279 | 19 | 1.002546 | 0002166,0002233,etc |
| interstellar medium | ISM | 238 | 18 | 2.001687 | 0002411,0002527,etc |
| nasa/ipac extragalactic database | NED | 31 | 17 | 1.000253 | 0002146,0002009,etc |
| gamma ray burst | GRB | 438 | 16 | 2.00914 | 0002306,0002218,etc |
| intergalactic medium | IGM | 127 | 13 | 2.002235 | 0002247,0002009,etc |
| initial mass function | IMF | 53 | 11 | 1.001303 | 0002337,0002457,etc |
| infrared space observatory | ISO | 120 | 11 | 2.001287 | 0002357,0002421,etc |
| hubble space telescope | HST | 105 | 11 | 2.001022 | 0002445,0002244,etc |
| asymptotic giant branch | AGB | 99 | 9 | 2.003133 | 0002146,0002373,etc |
| luminosity function | LF | 179 | 9 | 2.004025 | 0002036,0002190,etc |
| star formation rate | SFR | 113 | 9 | 2.003634 | 0002445,0002241,etc |
| very large array | VLA | 63 | 8 | 1.000786 | 0002159,0002191,etc |
| supernova remnant | SNR | 271 | 8 | 2.00345 | 0002347,0002411,etc |
| kolmogorov smirnov | KS | 17 | 7 | 1.000349 | 0002170,0002265,etc |
| x ray background | XRB | 73 | 7 | 2.002074 | 0002313,0002190,etc |
| rossi x ray timing explorer | RXTE | 61 | 7 | 1.001438 | 0002074,0002181,etc |
| proportional counter array | PCA | 44 | 7 | 1.001633 | 0002074,0002181,etc |
| supernova | SN | 550 | 7 | 1.011964 | 0002336,0002168,etc |
| equation of state | EOS | 189 | 7 | 2.002783 | 0002528,0002483,etc |
| smoothed particle hydrodynamics | SPH | 122 | 6 | 1.003021 | 0002437,0002362,etc |
| quasi periodic oscillation | QPO | 254 | 6 | 2.004357 | 0002084,0002074,etc |
| photodissociation region | PDR | 70 | 6 | 2.002617 | 0002357,0002282,etc |
| sloan digital sky survey | SDSS | 21 | 6 | 1.000512 | 0002124,0002190,etc |
| narrow line region | NLR | 147 | 5 | 2.002854 | 0002438,0002008,etc |
| friedmann robertson walker | FRW | 23 | 5 | 1.00047 | 0002281,0002156,etc |
| sunyaev zel'dovich | SZ | 247 | 5 | 2.007513 | 0002271,0002044,etc |
| full width at half maximum | FWHM | 8 | 5 | 1.000162 | 0002271,0002218,etc |
| short wavelength spectrometer | SWS | 77 | 5 | 2.001846 | 0002421,0002273,etc |
| very long baseline array | VLBA | 42 | 5 | 2.001164 | 0002097,0002085,etc |
| lyman break galaxy | LBG | 145 | 5 | 1.004994 | 0002425,0002241,etc |
| color magnitude diagram | CMD | 113 | 5 | 2.002502 | 0002439,0002205,etc |
| low mass x ray binary | LMXRB | 21 | 5 | 1.000218 | 0002348,0002074,etc |
| red giant branch | RGB | 189 | 5 | 2.003113 | 0002205,0002511,etc |
| horizontal branch | HB | 225 | 5 | 2.005029 | 0002205,0002505,etc |
| compton gamma ray observatory | CGRO | 7 | 5 | 1.000183 | 0002492,0002181,etc |
| ultra high energy cosmic ray | UHECR | 141 | 5 | 2.003002 | 0002155,0002006,etc |
| signal to noise | S/N | 29 | 5 | 2.000295 | 0002062,0002195,etc |
| brightest cluster galaxy | BCG | 110 | 5 | 2.00632 | 0002185,0002507,etc |
| far ultraviolet | FUV | 144 | 5 | 1.004964 | 0002005,0002111,etc |
| high resolution imager | HRI | 35 | 5 | 1.000263 | 0002005,0002033,etc |
| wolf rayet | WR | 219 | 4 | 2.006895 | 0002233,0002411,etc |
| intracluster medium | ICM | 35 | 4 | 1.00143 | 0002375,0002017,etc |
| inverse compton | IC | 46 | 4 | 1.003366 | 0002375,0002411,etc |
| james clerk maxwell telescope | JCMT | 18 | 4 | 1.00034 | 0002436,0002083,etc |
| semi analytic model | SAM | 30 | 4 | 1.001273 | 0002170,0002454,etc |
| big bang nucleosynthesis | BBN | 52 | 4 | 2.000873 | 0002056,0002248,etc |
| cosmic background explorer | COBE | 32 | 4 | 2.001039 | 0002110,0002044,etc |
| dark matter | DM | 63 | 4 | 1.0028 | 0002309,0002336,etc |
| infrared | IR | 28 | 4 | 2.000362 | 0002421,0002374,etc |
| polycyclic aromatic hydrocarbon | PAH | 45 | 4 | 2.00166 | 0002421,0002209,etc |
| broad absorption line | BAL | 222 | 4 | 1.01561 | 0002108,0002199,etc |
| interactive analysis | IA | 8 | 4 | 1.00058 | 0002008,0002195,etc |
| main sequence | MS | 60 | 4 | 2.003924 | 0002411,0002205,etc |
| image reduction and analysis facility | IRAF | 10 | 4 | 1.000086 | 0002062,0002344,etc |
| pre main sequence | PMS | 49 | 4 | 2.003038 | 0002466,0002144,etc |
| ultraviolet | UV | 176 | 4 | 2.008096 | 0002161,0002111,etc |
| burst and transient source experiment | BATSE | 39 | 4 | 1.002673 | 0002181,0002327,etc |
| position angle | PA | 26 | 4 | 1.000868 | 0002131,0002115,etc |
| all sky monitor | ASM | 33 | 4 | 2.001056 | 0002168,0002327,etc |
| equivalent width | EW | 13 | 4 | 2.000324 | 0002396,0002443,etc |
| gigahertz peaked spectrum | GPS | 169 | 3 | 2.003411 | 0002129,0002130,etc |
| very long baseline interferometry | VLBI | 43 | 3 | 2.001473 | 0002129,0002085,etc |
| large magellanic cloud | LMC | 30 | 3 | 2.000391 | 0002166,0002256,etc |
| accretion induced collapse | AIC | 29 | 3 | 2.002884 | 0002337,0002155,etc |
| red supergiant | RSG | 27 | 3 | 1.00039 | 0002233,0002411,etc |
| space telescope imaging spectrograph | STIS | 21 | 3 | 2.00146 | 0002438,0002108,etc |
| cosmic infrared background | CIB | 15 | 3 | 1.002258 | 0002436,0002283,etc |
| fundamental plane | FP | 57 | 3 | 2.001251 | 0002086,0002199,etc |
| black hole candidate | BHC | 17 | 3 | 1.000548 | 0002084,0002219,etc |
| proportional counter unit | PCU | 17 | 3 | 1.000188 | 0002084,0002265,etc |
| galactic center | GC | 192 | 3 | 2.00324 | 0002421,0002062,etc |
| relative spectral response function | RSRF | 6 | 3 | 1.000055 | 0002008,0002195,etc |
| extensive air showers | EAS | 47 | 3 | 1.004777 | 0002076,0002077,etc |
| near infrared camera and multi object spectrometer | NICMOS | 56 | 3 | 2.000353 | 0002445,0002078,etc |
| black hole | BH | 48 | 3 | 2.000636 | 0002190,0002012,etc |
| planetary nebula | PN | 175 | 3 | 2.013621 | 0002373,0002154,etc |
| full width half maximum | FWHM | 10 | 3 | 1.000128 | 0002256,0002490,etc |
| agenzia spaziale italiana | ASI | 6 | 3 | 1.000431 | 0002348,0002346,etc |
| consiglio nazionale delle ricerche | CNR | 7 | 3 | 1.000834 | 0002348,0002346,etc |
| cosmic ray | CR | 238 | 3 | 2.005971 | 0002411,0002492,etc |
| nasa extragalactic database | NED | 5 | 3 | 1.000196 | 0002101,0002297,etc |
| automatic plate measuring | APM | 65 | 3 | 2.003553 | 0002138,0002459,etc |
| greisen zatsepin kuzmin | GZK | 33 | 3 | 1.000421 | 0002155,0002006,etc |
| far infrared | FIR | 21 | 3 | 1.001748 | 0002322,0002046,etc |
| hot dark matter | HDM | 6 | 3 | 1.000275 | 0002364,0002030,etc |
| low surface brightness | LSB | 103 | 3 | 2.009422 | 0002191,0002080,etc |
| broad line region | BLR | 20 | 3 | 2.001334 | 0002107,0002223,etc |
| high velocity cloud | HVC | 105 | 3 | 2.007708 | 0002214,0002485,etc |
| cosmic background radiation | CBR | 21 | 3 | 2.000094 | 0002044,0002504,etc |
| united kingdom infrared telescope | UKIRT | 8 | 3 | 1.000943 | 0002094,0002493,etc |
| globular cluster system | GCS | 81 | 3 | 2.001226 | 0002088,0002087,etc |
| large velocity gradient | LVG | 3 | 3 | 1.00002 | 0002478,0002484,etc |
| globular cluster | GC | 76 | 3 | 2.008649 | 0002142,0002003,etc |
| large scale structure | LSS | 12 | 3 | 1.000144 | 0002030,0002522,etc |
| unidentified infrared band | UIB | 18 | 3 | 2.001258 | 0002195,0002209,etc |
| pure luminosity evolution | PLE | 19 | 3 | 2.001368 | 0002183,0002081,etc |
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