| active galactic nucleus | AGN | 234 | 23 | 1.003026 | 0006351,0006063,etc |
| spectral energy distribution | SED | 129 | 22 | 2.000923 | 0006337,0006364,etc |
| point spread function | PSF | 442 | 21 | 1.00499 | 0006361,0006427,etc |
| cosmic microwave background | CMB | 266 | 20 | 1.0032 | 0006349,0006072,etc |
| nasa/ipac extragalactic database | NED | 30 | 19 | 1.00021 | 0006057,0006148,etc |
| interstellar medium | ISM | 242 | 19 | 2.001767 | 0006031,0006202,etc |
| cold dark matter | CDM | 326 | 18 | 2.003013 | 0006364,0006065,etc |
| supernova | SN | 786 | 11 | 2.012865 | 0006190,0006065,etc |
| hubble space telescope | HST | 146 | 10 | 2.001956 | 0006409,0006217,etc |
| intergalactic medium | IGM | 181 | 10 | 2.004082 | 0006379,0006374,etc |
| luminosity function | LF | 157 | 10 | 2.001827 | 0006122,0006026,etc |
| initial mass function | IMF | 37 | 9 | 2.001996 | 0006253,0006301,etc |
| large magellanic cloud | LMC | 474 | 9 | 2.006911 | 0006320,0006251,etc |
| near infrared | near-IR | 76 | 8 | 1.003254 | 0006094,0006409,etc |
| very large array | VLA | 54 | 8 | 1.001101 | 0006094,0006038,etc |
| gamma ray burst | GRB | 292 | 8 | 1.007158 | 0006095,0006051,etc |
| far infrared | FIR | 113 | 7 | 1.003811 | 0006337,0006172,etc |
| color magnitude diagram | CMD | 144 | 7 | 1.004175 | 0006411,0006236,etc |
| star formation rate | SFR | 55 | 7 | 2.001625 | 0006361,0006301,etc |
| supernova remnant | SNR | 85 | 7 | 1.0056 | 0006361,0006149,etc |
| low mass x ray binary | LMXB | 27 | 7 | 1.00075 | 0006119,0006307,etc |
| small magellanic cloud | SMC | 77 | 7 | 1.001675 | 0006236,0006251,etc |
| full width at half maximum | FWHM | 37 | 6 | 1.00054 | 0006335,0006361,etc |
| local thermodynamic equilibrium | LTE | 120 | 6 | 1.003728 | 0006049,0006171,etc |
| nrao vla sky survey | NVSS | 17 | 6 | 1.003122 | 0006258,0006379,etc |
| main sequence | MS | 109 | 6 | 1.001382 | 0006191,0006405,etc |
| ultraviolet | UV | 134 | 6 | 1.003999 | 0006172,0006339,etc |
| cosmic microwave background radiation | CMB | 52 | 6 | 2.001968 | 0006445,0006381,etc |
| dark matter | DM | 146 | 6 | 2.004427 | 0006389,0006408,etc |
| low surface brightness | LSB | 103 | 5 | 1.008469 | 0006006,0006253,etc |
| james clerk maxwell telescope | JCMT | 22 | 5 | 1.000636 | 0006094,0006188,etc |
| horizontal branch | HB | 139 | 5 | 1.005016 | 0006191,0006100,etc |
| young stellar object | YSO | 27 | 5 | 2.00059 | 0006156,0006212,etc |
| black hole | BH | 127 | 5 | 1.005392 | 0006351,0006376,etc |
| kolmogorov smirnov | KS | 14 | 5 | 1.000444 | 0006379,0006347,etc |
| broad line region | BLR | 33 | 5 | 1.00222 | 0006427,0006274,etc |
| big bang nucleosynthesis | BBN | 76 | 5 | 2.001238 | 0006445,0006279,etc |
| red giant branch | RGB | 86 | 5 | 2.001701 | 0006235,0006299,etc |
| two dimensional | 2-D | 39 | 5 | 1.000867 | 0006240,0006324,etc |
| equation of state | EOS | 39 | 4 | 2.00034 | 0006135,0006440,etc |
| wide field camera | WFC | 61 | 4 | 2.002212 | 0006335,0006325,etc |
| all sky monitor | ASM | 14 | 4 | 1.000463 | 0006335,0006061,etc |
| one dimensional | 1D | 27 | 4 | 2.000658 | 0006351,0006161,etc |
| rosat all sky survey | RASS | 20 | 4 | 1.000946 | 0006148,0006127,etc |
| cosmic x ray background | CXB | 58 | 4 | 2.003137 | 0006148,0006202,etc |
| signal to noise ratio | SNR | 23 | 4 | 2.000418 | 0006003,0006222,etc |
| position sensitive proportional counter | PSPC | 60 | 4 | 2.001122 | 0006361,0006394,etc |
| field of view | FOV | 13 | 4 | 1.000354 | 0006361,0006209,etc |
| infrared space observatory | ISO | 158 | 4 | 2.003623 | 0006138,0006090,etc |
| high velocity cloud | HVC | 63 | 4 | 2.006534 | 0006122,0006389,etc |
| cataclysmic variable | CV | 22 | 4 | 2.000229 | 0006202,0006236,etc |
| smoothed particle hydrodynamics | SPH | 20 | 4 | 2.000966 | 0006322,0006345,etc |
| australia telescope compact array | ATCA | 20 | 4 | 1.000635 | 0006072,0006061,etc |
| zero age main sequence | ZAMS | 13 | 4 | 1.000348 | 0006251,0006406,etc |
| multi object spectrograph | MOS | 12 | 4 | 1.000399 | 0006155,0006153,etc |
| signal to noise | S/N | 40 | 4 | 2.00086 | 0006287,0006149,etc |
| sloan digital sky survey | SDSS | 51 | 4 | 2.002676 | 0006271,0006281,etc |
| pure luminosity evolution | PLE | 7 | 4 | 1.001198 | 0006019,0006430,etc |
| infrared | IR | 244 | 4 | 2.006456 | 0006274,0006080,etc |
| european southern observatory | ESO | 10 | 4 | 1.000191 | 0006299,0006313,etc |
| rossi x ray timing explorer | RXTE | 6 | 3 | 1.000068 | 0006335,0006091,etc |
| equivalent width | EW | 10 | 3 | 2.000815 | 0006335,0006427,etc |
| sunyaev zel'dovich | SZ | 38 | 3 | 2.003676 | 0006453,0006455,etc |
| singular isothermal sphere | SIS | 10 | 3 | 2.000112 | 0006197,0006184,etc |
| power density spectrum | PDS | 77 | 3 | 2.006241 | 0006227,0006139,etc |
| high resolution imager | HRI | 45 | 3 | 2.00132 | 0006361,0006072,etc |
| ultra high energy cosmic ray | UHECR | 48 | 3 | 2.002316 | 0006349,0006316,etc |
| greisen zatsepin kuzmin | GZK | 26 | 3 | 1.000591 | 0006349,0006111,etc |
| diffuse ionized gas | DIG | 90 | 3 | 2.002956 | 0006301,0006026,etc |
| period luminosity color | PLC | 37 | 3 | 2.001035 | 0006236,0006251,etc |
| star formation | SF | 44 | 3 | 2.003795 | 0006038,0006400,etc |
| lyon meudon extragalactic database | LEDA | 6 | 3 | 1.000026 | 0006038,0006296,etc |
| white dwarf | WD | 157 | 3 | 2.006586 | 0006414,0006383,etc |
| giant molecular cloud | GMC | 19 | 3 | 2.000838 | 0006084,0006100,etc |
| magnetohydrodynamic | MHD | 40 | 3 | 2.000566 | 0006105,0006456,etc |
| magellanic cloud | MC | 144 | 3 | 2.0081 | 0006251,0006229,etc |
| period luminosity | PL | 60 | 3 | 1.002784 | 0006251,0006228,etc |
| las campanas redshift survey | LCRS | 157 | 3 | 2.003443 | 0006155,0006153,etc |
| zone of avoidance | ZOA | 116 | 3 | 2.003171 | 0006121,0006120,etc |
| great attractor | GA | 48 | 3 | 2.000943 | 0006121,0006199,etc |
| quasi periodic oscillation | QPO | 52 | 3 | 2.005931 | 0006456,0006091,etc |
| eso slice project | ESP | 7 | 3 | 1.000099 | 0006389,0006153,etc |
| particle mesh | PM | 7 | 3 | 1.000333 | 0006198,0006203,etc |
| probability distribution function | PDF | 119 | 3 | 2.004318 | 0006192,0006269,etc |
| three dimensional | 3-D | 40 | 3 | 1.001944 | 0006240,0006118,etc |
| proportional counter array | PCA | 11 | 3 | 1.000636 | 0006245,0006234,etc |
| massive compact halo object | MACHO | 12 | 3 | 2.000304 | 0006449,0006424,etc |
| x ray luminosity function | XLF | 13 | 3 | 2.000265 | 0006109,0006081,etc |
| planetary camera | PC | 82 | 3 | 1.004015 | 0006325,0006230,etc |
| wide field and planetary camera 2 | WFPC2 | 49 | 3 | 1.00238 | 0006230,0006306,etc |
| inverse compton | IC | 25 | 3 | 2.002031 | 0006176,0006391,etc |