| cosmic microwave background | CMB | 509 | 25 | 2.003366 | 9912180,9912366,etc |
| gamma ray burst | GRB | 619 | 24 | 2.006869 | 9912484,9912566,etc |
| nasa/ipac extragalactic database | NED | 29 | 22 | 1.000161 | 9912325,9912273,etc |
| initial mass function | IMF | 277 | 21 | 1.003393 | 9912391,9912526,etc |
| active galactic nucleus | AGN | 209 | 20 | 2.004405 | 9912032,9912362,etc |
| cold dark matter | CDM | 174 | 19 | 1.0017 | 9912395,9912366,etc |
| interstellar medium | ISM | 118 | 16 | 2.002994 | 9912053,9912058,etc |
| star formation rate | SFR | 130 | 14 | 2.003875 | 9912391,9912544,etc |
| spectral energy distribution | SED | 194 | 13 | 1.002526 | 9912472,9912034,etc |
| point spread function | PSF | 151 | 13 | 2.001977 | 9912569,9912291,etc |
| supernova | SN | 518 | 13 | 2.013219 | 9912219,9912562,etc |
| asymptotic giant branch | AGB | 198 | 11 | 2.005253 | 9912350,9912496,etc |
| hubble space telescope | HST | 148 | 11 | 2.001631 | 9912047,9912204,etc |
| supernova remnant | SNR | 317 | 11 | 2.005278 | 9912509,9912061,etc |
| equivalent width | EW | 58 | 10 | 2.002578 | 9912127,9912273,etc |
| luminosity function | LF | 252 | 9 | 2.005361 | 9912350,9912384,etc |
| red giant branch | RGB | 298 | 9 | 2.005534 | 9912350,9912526,etc |
| inverse compton | IC | 141 | 9 | 2.003969 | 9912421,9912129,etc |
| intergalactic medium | IGM | 97 | 9 | 1.001179 | 9912432,9912141,etc |
| very large array | VLA | 56 | 9 | 2.002065 | 9912354,9912197,etc |
| proportional counter array | PCA | 43 | 7 | 1.001291 | 9912103,9912316,etc |
| planetary nebula | PN | 298 | 7 | 2.009763 | 9912191,9912323,etc |
| ultraluminous infrared galaxy | ULIRG | 102 | 6 | 1.008258 | 9912325,9912114,etc |
| infrared | IR | 177 | 6 | 2.004936 | 9912053,9912114,etc |
| advection dominated accretion flow | ADAF | 100 | 6 | 2.001694 | 9912170,9912304,etc |
| dark matter | DM | 351 | 6 | 2.005187 | 9912004,9912098,etc |
| soft gamma repeater | SGR | 105 | 6 | 1.007632 | 9912562,9912281,etc |
| black hole | BH | 168 | 6 | 2.002112 | 9912064,9912546,etc |
| large magellanic cloud | LMC | 69 | 6 | 2.001296 | 9912323,9912536,etc |
| large scale structure | LSS | 29 | 5 | 2.002602 | 9912362,9912275,etc |
| intracluster medium | ICM | 50 | 5 | 2.001252 | 9912421,9912412,etc |
| horizontal branch | HB | 62 | 5 | 2.003183 | 9912027,9912526,etc |
| signal to noise | S/N | 15 | 5 | 1.000438 | 9912027,9912351,etc |
| infrared space observatory | ISO | 74 | 5 | 1.005586 | 9912544,9912252,etc |
| color magnitude diagram | CMD | 54 | 5 | 2.000836 | 9912096,9912291,etc |
| ultraviolet | UV | 128 | 5 | 2.002469 | 9912565,9912368,etc |
| signal to noise ratio | SNR | 37 | 5 | 1.001224 | 9912565,9912103,etc |
| proportional counter unit | PCU | 20 | 5 | 1.000534 | 9912103,9912316,etc |
| full width at half maximum | FWHM | 18 | 5 | 1.000267 | 9912432,9912204,etc |
| wolf rayet | WR | 105 | 5 | 2.004265 | 9912203,9912276,etc |
| anomalous x ray pulsar | AXP | 251 | 5 | 2.007131 | 9912066,9912281,etc |
| standard cold dark matter | SCDM | 10 | 5 | 1.000509 | 9912329,9912038,etc |
| nordic optical telescope | NOT | 52 | 5 | 1.000872 | 9912160,9912070,etc |
| low mass x ray binary | LMXB | 54 | 5 | 1.001484 | 9912113,9912259,etc |
| near infrared | NIR | 86 | 5 | 1.002625 | 9912114,9912423,etc |
| particle mesh | PM | 316 | 5 | 2.006561 | 9912408,9912299,etc |
| intra cluster medium | ICM | 24 | 5 | 1.001118 | 9912486,9912299,etc |
| rosat all sky survey | RASS | 67 | 4 | 1.004719 | 9912362,9912125,etc |
| rayleigh jeans | RJ | 10 | 4 | 1.000296 | 9912180,9912009,etc |
| young stellar object | YSO | 41 | 4 | 1.004639 | 9912328,9912235,etc |
| charge coupled device | CCD | 81 | 4 | 2.00325 | 9912428,9912495,etc |
| canada france redshift survey | CFRS | 25 | 4 | 2.000662 | 9912544,9912196,etc |
| owens valley radio observatory | OVRO | 46 | 4 | 2.000736 | 9912047,9912171,etc |
| cosmic microwave background radiation | CMB | 63 | 4 | 2.001054 | 9912225,9912329,etc |
| globular cluster | GC | 161 | 4 | 2.004478 | 9912526,9912468,etc |
| sloan digital sky survey | SDSS | 96 | 4 | 2.002711 | 9912119,9912149,etc |
| rossi x ray timing explorer | RXTE | 29 | 4 | 1.002037 | 9912316,9912028,etc |
| very long baseline interferometry | VLBI | 34 | 4 | 2.00159 | 9912272,9912263,etc |
| field of view | FOV | 13 | 4 | 1.00084 | 9912479,9912084,etc |
| direcci'{o}n general de ense {n}anza superior e investigaci'{o}n cient'fica | DGESIC | 4 | 4 | 1.000086 | 9912160,9912162,etc |
| hubble deep field | HDF | 117 | 4 | 2.001952 | 9912264,9912122,etc |
| far infrared | FIR | 33 | 4 | 1.000749 | 9912197,9912430,etc |
| planetary camera | PC | 33 | 4 | 2.001114 | 9912340,9912477,etc |
| position sensitive proportional counter | PSPC | 46 | 4 | 2.001296 | 9912412,9912003,etc |
| sunyaev zel'dovich effect | SZE | 138 | 4 | 2.003326 | 9912009,9912010,etc |
| berkeley illinois maryland association | BIMA | 102 | 4 | 2.003084 | 9912009,9912010,etc |
| cataclysmic variable | CV | 21 | 4 | 1.000436 | 9912259,9912229,etc |
| high energy astrophysics science archive research center | HEASARC | 5 | 4 | 1.000067 | 9912178,9912462,etc |
| luminous blue variable | LBV | 36 | 4 | 1.001012 | 9912061,9912003,etc |
| cool neutral medium | CNM | 29 | 3 | 2.000771 | 9912469,9912470,etc |
| space telescope imaging spectrograph | STIS | 61 | 3 | 2.002434 | 9912027,9912167,etc |
| small magellanic cloud | SMC | 11 | 3 | 1.000534 | 9912112,9912323,etc |
| canada france hawaii telescope | CFHT | 8 | 3 | 1.000519 | 9912428,9912199,etc |
| pre main sequence | PMS | 88 | 3 | 2.002459 | 9912145,9912384,etc |
| luminous infrared galaxy | LIRG | 22 | 3 | 2.001023 | 9912544,9912216,etc |
| two dimensional | 2D | 10 | 3 | 1.000589 | 9912565,9912449,etc |
| greisen zatsepin kuzmin | GZK | 8 | 3 | 1.000329 | 9912240,9912058,etc |
| ultra high energy cosmic ray | UHECR | 43 | 3 | 2.001545 | 9912240,9912058,etc |
| tully fisher | TF | 83 | 3 | 2.001993 | 9912004,9912201,etc |
| power spectral density | PSD | 16 | 3 | 1.001835 | 9912177,9912510,etc |
| power density spectrum | PDS | 13 | 3 | 2.000485 | 9912028,9912546,etc |
| equation of state | EOS | 19 | 3 | 2.000946 | 9912303,9912290,etc |
| neutron star | NS | 69 | 3 | 2.004027 | 9912562,9912290,etc |
| damped ly absorber | DLA | 115 | 3 | 2.005962 | 9912352,9912268,etc |
| burst and transient source experiment | BATSE | 12 | 3 | 1.001207 | 9912019,9912351,etc |
| digitized sky survey | DSS | 10 | 3 | 2.000205 | 9912386,9912143,etc |
| giant molecular cloud | GMC | 68 | 3 | 1.002686 | 9912300,9912252,etc |
| zero age main sequence | ZAMS | 14 | 3 | 1.000199 | 9912384,9912310,etc |
| white dwarf | WD | 60 | 3 | 2.003899 | 9912264,9912244,etc |
| astronomical image processing system | AIPS | 4 | 3 | 1.000089 | 9912197,9912521,etc |
| photodissociation region | PDR | 6 | 3 | 1.000733 | 9912197,9912369,etc |
| line of sight | LOS | 8 | 3 | 1.001632 | 9912398,9912407,etc |
| smoothed particle hydrodynamics | SPH | 163 | 3 | 2.005216 | 9912098,9912091,etc |
| star formation efficiency | SFE | 22 | 3 | 1.001212 | 9912529,9912006,etc |
| national science foundation | NSF | 5 | 3 | 1.000196 | 9912410,9912141,etc |
| westerbork synthesis radio telescope | WSRT | 13 | 3 | 1.000525 | 9912141,9912143,etc |
| soft gamma ray repeater | SGR | 213 | 3 | 2.00829 | 9912446,9912207,etc |
| wide field and planetary camera 2 | WFPC2 | 34 | 3 | 2.002996 | 9912340,9912477,etc |
| synchrotron self compton | SSC | 39 | 3 | 2.002037 | 9912394,9912164,etc |
| kolmogorov smirnov | KS | 6 | 3 | 1.000238 | 9912424,9912121,etc |
|