| cosmic microwave background | CMB | 435 | 24 | 2.003608 | 9911219,9911115,etc |
| active galactic nucleus | AGN | 329 | 22 | 2.003144 | 9911278,9911220,etc |
| nasa/ipac extragalactic database | NED | 26 | 19 | 1.000161 | 9911414,9911402,etc |
| spectral energy distribution | SED | 125 | 18 | 2.001869 | 9911373,9911379,etc |
| point spread function | PSF | 212 | 17 | 2.003753 | 9911323,9911402,etc |
| interstellar medium | ISM | 240 | 17 | 2.002356 | 9911412,9911450,etc |
| star formation rate | SFR | 147 | 16 | 1.002249 | 9911304,9911339,etc |
| initial mass function | IMF | 175 | 14 | 2.002117 | 9911312,9911178,etc |
| cold dark matter | CDM | 61 | 12 | 1.000927 | 9911372,9911059,etc |
| horizontal branch | HB | 450 | 10 | 1.005972 | 9911137,9911237,etc |
| supernova | SN | 606 | 10 | 2.012944 | 9911178,9911158,etc |
| red giant branch | RGB | 192 | 9 | 2.002971 | 9911270,9911367,etc |
| color magnitude diagram | CMD | 89 | 9 | 1.001401 | 9911410,9911382,etc |
| very large array | VLA | 58 | 9 | 2.001112 | 9911484,9911531,etc |
| supernova remnant | SNR | 165 | 9 | 2.00662 | 9911190,9911150,etc |
| low mass x ray binary | LMXB | 64 | 8 | 2.001875 | 9911234,9911083,etc |
| gamma ray burst | GRB | 539 | 8 | 2.008747 | 9911098,9911228,etc |
| large magellanic cloud | LMC | 187 | 8 | 2.003516 | 9911237,9911296,etc |
| infrared space observatory | ISO | 120 | 7 | 2.002835 | 9911406,9911459,etc |
| neutron star | NS | 200 | 7 | 2.002465 | 9911312,9911071,etc |
| rosat all sky survey | RASS | 43 | 7 | 1.001049 | 9911115,9911521,etc |
| hubble space telescope | HST | 118 | 7 | 2.001021 | 9911052,9911528,etc |
| infrared | IR | 182 | 6 | 2.006044 | 9911373,9911379,etc |
| main sequence | MS | 84 | 6 | 2.000731 | 9911270,9911339,etc |
| inverse compton | IC | 149 | 6 | 2.00222 | 9911132,9911060,etc |
| inverse compton scattering | ICS | 182 | 6 | 1.002684 | 9911253,9911028,etc |
| asymptotic giant branch | AGB | 178 | 6 | 2.002701 | 9911450,9911377,etc |
| advection dominated accretion flow | ADAF | 78 | 6 | 2.003794 | 9911051,9911143,etc |
| cosmic microwave background radiation | CMBR | 117 | 6 | 2.002122 | 9911330,9911108,etc |
| high resolution imager | HRI | 49 | 5 | 2.002264 | 9911323,9911379,etc |
| intracluster medium | ICM | 69 | 5 | 2.0019 | 9911388,9911515,etc |
| power density spectra | PDS | 72 | 5 | 2.001291 | 9911290,9911345,etc |
| cataclysmic variable | CV | 48 | 5 | 2.001386 | 9911303,9911088,etc |
| ultraluminous infrared galaxy | ULIRG | 85 | 5 | 2.002493 | 9911304,9911310,etc |
| sloan digital sky survey | SDSS | 29 | 5 | 2.000471 | 9911115,9911059,etc |
| full width at half maximum | FWHM | 53 | 5 | 1.001384 | 9911402,9911476,etc |
| intergalactic medium | IGM | 45 | 5 | 1.001318 | 9911339,9911446,etc |
| proportional counter array | PCA | 70 | 5 | 2.001036 | 9911531,9911338,etc |
| rossi x ray timing explorer | RXTE | 48 | 5 | 2.005413 | 9911338,9911263,etc |
| neutron stars | NS | 216 | 4 | 2.008897 | 9911532,9911134,etc |
| smoothed particle hydrodynamics | SPH | 110 | 4 | 2.004598 | 9911048,9911068,etc |
| lyman break galaxy | LBG | 47 | 4 | 2.001155 | 9911304,9911146,etc |
| period luminosity | PL | 42 | 4 | 1.002947 | 9911193,9911296,etc |
| anomalous x ray pulsar | AXP | 41 | 4 | 1.008983 | 9911190,9911319,etc |
| luminosity function | LF | 19 | 4 | 1.000408 | 9911237,9911146,etc |
| friedmann robertson walker | FRW | 17 | 4 | 1.001226 | 9911059,9911530,etc |
| all sky monitor | ASM | 20 | 4 | 2.001211 | 9911179,9911531,etc |
| extreme ultraviolet | EUV | 134 | 4 | 2.005176 | 9911001,9911529,etc |
| faint object spectrograph | FOS | 30 | 4 | 2.000642 | 9911128,9911094,etc |
| ultraviolet | UV | 46 | 4 | 2.000779 | 9911449,9911367,etc |
| soft x ray transient | SXT | 37 | 4 | 1.003021 | 9911176,9911197,etc |
| star formation | SF | 64 | 4 | 1.002882 | 9911009,9911094,etc |
| very long baseline array | VLBA | 46 | 3 | 2.001192 | 9911414,9911142,etc |
| rotation measure | RM | 78 | 3 | 1.005012 | 9911414,9911454,etc |
| tauri stars | TTS | 115 | 3 | 1.005352 | 9911508,9911244,etc |
| young stellar object | YSO | 21 | 3 | 2.000374 | 9911373,9911379,etc |
| dispersion measure | DM | 30 | 3 | 1.00151 | 9911234,9911185,etc |
| quasi periodic oscillations | QPO | 95 | 3 | 2.000986 | 9911290,9911345,etc |
| power density spectrum | PDS | 46 | 3 | 2.000827 | 9911290,9911345,etc |
| black holes | BH | 173 | 3 | 2.004122 | 9911312,9911532,etc |
| adaptive mesh refinement | AMR | 11 | 3 | 1.000695 | 9911407,9911098,etc |
| smooth particle hydrodynamics | SPH | 12 | 3 | 2.000342 | 9911466,9911280,etc |
| bolometric correction | BC | 29 | 3 | 1.000535 | 9911383,9911367,etc |
| blue compact galaxy | BCG | 294 | 3 | 2.003953 | 9911327,9911462,etc |
| equivalent width | EW | 18 | 3 | 2.000376 | 9911327,9911213,etc |
| inner lindblad resonance | ILR | 37 | 3 | 1.002399 | 9911278,9911488,etc |
| black hole | BH | 66 | 3 | 2.001282 | 9911098,9911071,etc |
| position angle | PA | 14 | 3 | 1.002727 | 9911253,9911069,etc |
| wolf rayet | WR | 101 | 3 | 2.002157 | 9911450,9911271,etc |
| broad absorption line | BAL | 132 | 3 | 2.005267 | 9911220,9911284,etc |
| x ray background | XRB | 18 | 3 | 1.00154 | 9911484,9911059,etc |
| standard cold dark matter | SCDM | 6 | 3 | 1.000533 | 9911447,9911325,etc |
| signal to noise ratio | S/N | 40 | 3 | 2.000405 | 9911146,9911112,etc |
| near infrared | NIR | 60 | 3 | 2.000692 | 9911488,9911427,etc |
| common envelope | CE | 13 | 3 | 1.000832 | 9911134,9911133,etc |
| hot bottom burning | HBB | 24 | 3 | 2.001591 | 9911226,9911033,etc |
| local group | LG | 20 | 3 | 2.000348 | 9911501,9911326,etc |
| two dimensional | 2D | 11 | 3 | 1.000377 | 9911068,9911183,etc |
| low mass x ray binaries | LMXB | 18 | 3 | 1.001756 | 9911338,9911275,etc |
| space telescope imaging spectrograph | STIS | 49 | 3 | 2.002687 | 9911128,9911363,etc |
| millisecond pulsar | MSP | 14 | 3 | 1.003967 | 9911083,9911385,etc |
| sunyaev zel'dovich | SZ | 19 | 3 | 2.001309 | 9911121,9911057,etc |
| high energy x ray timing experiment | HEXTE | 27 | 3 | 2.000479 | 9911173,9911224,etc |
| equation of state | EOS | 11 | 3 | 1.000057 | 9911077,9911192,etc |
| fast fourier transform | FFT | 7 | 3 | 1.00018 | 9911313,9911324,etc |
| black hole candidate | BHC | 14 | 3 | 1.001165 | 9911176,9911318,etc |
| broad line region | BLR | 86 | 3 | 2.001656 | 9911476,9911429,etc |
| cross correlation function | CCF | 223 | 3 | 1.00769 | 9911476,9911112,etc |
| laser guide star | LGS | 62 | 3 | 1.002707 | 9911036,9911030,etc |
| low energy concentrator spectrometer | LECS | 45 | 3 | 2.000332 | 9911352,9911168,etc |
| ultra high energy cosmic ray | UHECR | 97 | 3 | 2.00235 | 9911154,9911395,etc |
| compton gamma ray observatory | CGRO | 5 | 3 | 1.000468 | 9911452,9911061,etc |
| high velocity cloud | HVC | 98 | 3 | 2.003242 | 9911455,9911527,etc |
| extended medium sensitivity survey | EEMSS | 12 | 3 | 1.000801 | 9911244,9911037,etc |
| very long baseline interferometry | VLBI | 54 | 3 | 2.003608 | 9911454,9911463,etc |
| local thermodynamic equilibrium | LTE | 65 | 3 | 1.001659 | 9911320,9911317,etc |
| compact steep spectrum | CSS | 17 | 3 | 1.002746 | 9911474,9911063,etc |
| hubble deep field | HDF | 17 | 3 | 2.001584 | 9911037,9911094,etc |
| local standard of rest | LSR | 101 | 3 | 2.000399 | 9911161,9911368,etc |
| charge transfer efficiency | CTE | 21 | 3 | 1.000148 | 9911020,9911187,etc |