| active galactic nucleus | AGN | 493 | 32 | 2.003799 | 0010240,0010345,etc |
| interstellar medium | ISM | 300 | 30 | 2.001249 | 0010556,0010117,etc |
| cosmic microwave background | CMB | 284 | 28 | 2.002755 | 0010023,0010453,etc |
| spectral energy distribution | SED | 212 | 24 | 1.001535 | 0010088,0010099,etc |
| nasa/ipac extragalactic database | NED | 29 | 22 | 1.000126 | 0010556,0010615,etc |
| cold dark matter | CDM | 339 | 22 | 2.001986 | 0010088,0010158,etc |
| point spread function | PSF | 238 | 21 | 1.001615 | 0010240,0010427,etc |
| asymptotic giant branch | AGB | 391 | 17 | 2.003263 | 0010599,0010241,etc |
| initial mass function | IMF | 219 | 17 | 1.002907 | 0010028,0010275,etc |
| gamma ray burst | GRB | 648 | 15 | 1.008802 | 0010322,0010212,etc |
| hubble space telescope | HST | 208 | 14 | 2.001618 | 0010542,0010168,etc |
| star formation rate | SFR | 227 | 14 | 1.003186 | 0010441,0010223,etc |
| supernova remnant | SNR | 228 | 14 | 2.003031 | 0010494,0010157,etc |
| supernova | SN | 482 | 12 | 2.005026 | 0010158,0010123,etc |
| equivalent width | EW | 122 | 11 | 1.000893 | 0010542,0010359,etc |
| intergalactic medium | IGM | 182 | 10 | 2.002524 | 0010023,0010345,etc |
| planetary nebula | PN | 313 | 10 | 2.006342 | 0010237,0010241,etc |
| low surface brightness | LSB | 215 | 10 | 2.003256 | 0010594,0010525,etc |
| very large array | VLA | 121 | 10 | 2.001608 | 0010099,0010243,etc |
| luminosity function | LF | 128 | 9 | 2.001305 | 0010441,0010275,etc |
| cataclysmic variable | CV | 82 | 8 | 1.001786 | 0010359,0010136,etc |
| color magnitude diagram | CMD | 75 | 8 | 2.001309 | 0010359,0010168,etc |
| quasi periodic oscillation | QPO | 219 | 8 | 2.007655 | 0010139,0010560,etc |
| ultraviolet | UV | 164 | 8 | 2.005494 | 0010198,0010640,etc |
| broad line region | BLR | 77 | 8 | 2.003897 | 0010640,0010066,etc |
| neutron star | NS | 137 | 7 | 2.003269 | 0010430,0010243,etc |
| far infrared | FIR | 103 | 7 | 1.003326 | 0010441,0010640,etc |
| luminous blue variable | LBV | 86 | 7 | 1.001397 | 0010654,0010099,etc |
| position angle | PA | 59 | 7 | 2.001148 | 0010239,0010640,etc |
| intracluster medium | ICM | 167 | 7 | 2.002997 | 0010380,0010584,etc |
| low mass x ray binary | LMXB | 20 | 7 | 1.000298 | 0010378,0010489,etc |
| australia telescope compact array | ATCA | 45 | 7 | 1.000298 | 0010399,0010636,etc |
| signal to noise ratio | SNR | 29 | 7 | 1.00035 | 0010361,0010343,etc |
| infrared | IR | 194 | 7 | 2.004231 | 0010046,0010198,etc |
| inverse compton | IC | 97 | 7 | 2.002953 | 0010560,0010251,etc |
| large magellanic cloud | LMC | 188 | 7 | 1.005899 | 0010150,0010056,etc |
| white dwarf | WD | 158 | 7 | 2.003873 | 0010243,0010455,etc |
| ultraluminous infrared galaxy | ULIRG | 158 | 7 | 1.001894 | 0010066,0010125,etc |
| sloan digital sky survey | SDSS | 153 | 6 | 2.003917 | 0010059,0010470,etc |
| horizontal branch | HB | 112 | 6 | 2.001872 | 0010359,0010028,etc |
| digitized sky survey | DSS | 17 | 6 | 1.000356 | 0010359,0010439,etc |
| wolf rayet | WR | 153 | 6 | 2.002495 | 0010556,0010654,etc |
| all sky monitor | ASM | 19 | 6 | 1.000389 | 0010139,0010523,etc |
| tully fisher | TF | 33 | 6 | 1.005106 | 0010594,0010525,etc |
| near infrared | NIR | 126 | 6 | 2.001364 | 0010522,0010033,etc |
| five college radio astronomy observatory | FCRAO | 8 | 5 | 1.000197 | 0010393,0010392,etc |
| lyman break galaxy | LBG | 54 | 5 | 2.005406 | 0010427,0010158,etc |
| signal to noise | S/N | 11 | 5 | 1.000088 | 0010359,0010654,etc |
| cosmic microwave background radiation | CMB | 22 | 5 | 1.00037 | 0010366,0010126,etc |
| national science foundation | NSF | 14 | 5 | 1.000256 | 0010654,0010136,etc |
| local thermodynamic equilibrium | LTE | 105 | 5 | 1.009211 | 0010067,0010399,etc |
| field of view | FOV | 36 | 5 | 1.000459 | 0010380,0010155,etc |
| dispersion measure | DM | 69 | 5 | 2.000737 | 0010243,0010010,etc |
| reflection grating spectrometer | RGS | 53 | 5 | 2.001263 | 0010608,0010423,etc |
| zero age main sequence | ZAMS | 19 | 5 | 2.000332 | 0010535,0010564,etc |
| extremely red object | ERO | 133 | 5 | 1.008868 | 0010335,0010100,etc |
| two micron all sky survey | 2MASS | 163 | 5 | 2.00541 | 0010033,0010528,etc |
| broad absorption line | BAL | 61 | 5 | 1.001188 | 0010125,0010230,etc |
| william herschel telescope | WHT | 69 | 5 | 2.000828 | 0010153,0010486,etc |
| new technology telescope | NTT | 11 | 4 | 1.000303 | 0010322,0010275,etc |
| black hole | BH | 77 | 4 | 1.002685 | 0010430,0010379,etc |
| large scale structure | LSS | 33 | 4 | 2.001892 | 0010228,0010375,etc |
| san diego supercomputer center | SDSC | 5 | 4 | 1.000285 | 0010174,0010615,etc |
| red supergiant | RSG | 34 | 4 | 2.001055 | 0010654,0010177,etc |
| dark matter | DM | 66 | 4 | 1.001511 | 0010223,0010253,etc |
| position velocity | PV | 42 | 4 | 1.000748 | 0010594,0010252,etc |
| united kingdom infrared telescope | UKIRT | 17 | 4 | 1.00049 | 0010522,0010007,etc |
| south atlantic anomaly | SAA | 6 | 4 | 1.000232 | 0010380,0010523,etc |
| low mass x ray binaries | LMXB | 12 | 4 | 2.000155 | 0010380,0010608,etc |
| local standard of rest | LSR | 5 | 4 | 1.00027 | 0010399,0010618,etc |
| very long baseline interferometry | VLBI | 17 | 4 | 1.002569 | 0010361,0010650,etc |
| planetary camera | PC | 108 | 4 | 2.003344 | 0010046,0010065,etc |
| proportional counter array | PCA | 18 | 4 | 1.001409 | 0010601,0010274,etc |
| burst and transient source experiment | BATSE | 11 | 4 | 1.000388 | 0010523,0010467,etc |
| star formation | SF | 53 | 4 | 1.003602 | 0010131,0010462,etc |
| fast fourier transform | FFT | 30 | 4 | 2.000876 | 0010243,0010555,etc |
| main sequence | MS | 34 | 4 | 2.00063 | 0010243,0010260,etc |
| wide field and planetary camera 2 | WFPC2 | 26 | 4 | 2.00023 | 0010146,0010065,etc |
| science analysis system | SAS | 9 | 4 | 1.000253 | 0010608,0010328,etc |
| supernova remnants | SNR | 93 | 4 | 2.002823 | 0010177,0010043,etc |
| european photon imaging camera | EPIC | 33 | 4 | 1.002364 | 0010386,0010328,etc |
| narrow line region | NLR | 41 | 4 | 1.003258 | 0010314,0010173,etc |
| faint object spectrograph | FOS | 38 | 4 | 2.000342 | 0010058,0010011,etc |
| space telescope imaging spectrograph | STIS | 21 | 4 | 2.000691 | 0010011,0010196,etc |
| hubble deep field | HDF | 232 | 4 | 2.003801 | 0010467,0010153,etc |
| polycyclic aromatic hydrocarbon | PAH | 167 | 4 | 2.009759 | 0010385,0010154,etc |
| young stellar object | YSO | 19 | 4 | 1.000545 | 0010410,0010051,etc |
| pure luminosity evolution | PLE | 32 | 4 | 2.001727 | 0010153,0010562,etc |
| mid infrared | MIR | 107 | 4 | 2.001896 | 0010128,0010541,etc |
| inter galactic medium | IGM | 13 | 3 | 1.001159 | 0010023,0010600,etc |
| soft x ray transient | SXT | 78 | 3 | 2.002735 | 0010430,0010572,etc |
| millisecond pulsar | MSP | 51 | 3 | 2.001606 | 0010599,0010359,etc |
| far ultraviolet | FUV | 14 | 3 | 2.000552 | 0010542,0010343,etc |
| magnetohydrodynamic | MHD | 24 | 3 | 2.001678 | 0010576,0010165,etc |
| high energy astrophysics science archive research center | HEASARC | 5 | 3 | 1.000065 | 0010372,0010274,etc |
| x ray background | XRB | 76 | 3 | 2.00434 | 0010345,0010483,etc |
| michelson doppler imager | MDI | 14 | 3 | 1.000288 | 0010323,0010346,etc |
| global oscillation network group | GONG | 9 | 3 | 1.000198 | 0010323,0010346,etc |
| globular cluster | GC | 541 | 3 | 2.009198 | 0010500,0010065,etc |
| chandra x ray center | CXC | 6 | 3 | 1.000341 | 0010355,0010167,etc |
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