| spectral energy distribution | SED | 157 | 27 | 1.001776 | 0007175,0007196,etc |
| point spread function | PSF | 153 | 24 | 1.001827 | 0007269,0007310,etc |
| interstellar medium | ISM | 203 | 22 | 1.002564 | 0007093,0007078,etc |
| active galactic nucleus | AGN | 559 | 21 | 2.004139 | 0007175,0007219,etc |
| cold dark matter | CDM | 163 | 20 | 1.003848 | 0007295,0007074,etc |
| initial mass function | IMF | 234 | 20 | 2.002915 | 0007383,0007298,etc |
| cosmic microwave background | CMB | 292 | 19 | 1.003738 | 0007196,0007333,etc |
| nasa/ipac extragalactic database | NED | 21 | 16 | 1.000147 | 0007219,0007030,etc |
| hubble space telescope | HST | 125 | 15 | 1.001145 | 0007252,0007358,etc |
| full width at half maximum | FWHM | 33 | 12 | 1.000137 | 0007068,0007030,etc |
| supernova remnant | SNR | 191 | 11 | 1.002944 | 0007229,0007465,etc |
| signal to noise ratio | SNR | 65 | 10 | 2.000686 | 0007269,0007071,etc |
| luminosity function | LF | 96 | 9 | 2.001649 | 0007232,0007173,etc |
| star formation rate | SFR | 145 | 9 | 2.001518 | 0007278,0007394,etc |
| gamma ray burst | GRB | 198 | 9 | 2.006295 | 0007280,0007320,etc |
| far infrared | FIR | 86 | 8 | 1.001433 | 0007175,0007095,etc |
| color magnitude diagram | CMD | 110 | 8 | 2.001577 | 0007298,0007394,etc |
| broad line region | BLR | 48 | 8 | 2.001718 | 0007421,0007357,etc |
| digitized sky survey | DSS | 26 | 8 | 1.00039 | 0007320,0007210,etc |
| signal to noise | S/N | 27 | 8 | 1.000365 | 0007030,0007063,etc |
| black hole | BH | 193 | 8 | 1.00743 | 0007355,0007185,etc |
| infrared | IR | 154 | 7 | 2.002183 | 0007095,0007269,etc |
| proportional counter array | PCA | 81 | 7 | 2.000989 | 0007092,0007250,etc |
| low mass x ray binary | LMXB | 129 | 7 | 1.004071 | 0007234,0007071,etc |
| red giant branch | RGB | 184 | 7 | 2.003575 | 0007038,0007239,etc |
| x ray background | XRB | 93 | 6 | 2.007748 | 0007175,0007106,etc |
| kolmogorov smirnov | KS | 26 | 6 | 1.000487 | 0007219,0007030,etc |
| singular isothermal sphere | SIS | 30 | 6 | 1.000636 | 0007286,0007354,etc |
| big bang nucleosynthesis | BBN | 79 | 6 | 2.005099 | 0007081,0007333,etc |
| intergalactic medium | IGM | 49 | 6 | 2.001245 | 0007217,0007462,etc |
| nordic optical telescope | NOT | 150 | 6 | 1.002205 | 0007320,0007088,etc |
| isaac newton telescope | INT | 23 | 6 | 1.000185 | 0007224,0007022,etc |
| supernova | SN | 295 | 6 | 1.009362 | 0007440,0007077,etc |
| intracluster medium | ICM | 125 | 6 | 2.002327 | 0007426,0007115,etc |
| wide field planetary camera 2 | WFPC2 | 67 | 6 | 1.000706 | 0007114,0007228,etc |
| near infrared | NIR | 63 | 5 | 2.001501 | 0007175,0007409,etc |
| asymptotic giant branch | AGB | 101 | 5 | 1.002473 | 0007173,0007139,etc |
| star formation | SF | 99 | 5 | 2.002322 | 0007074,0007278,etc |
| planetary nebula | PN | 116 | 5 | 2.002775 | 0007074,0007189,etc |
| large scale structure | LSS | 16 | 5 | 1.000869 | 0007333,0007290,etc |
| goddard high resolution spectrograph | GHRS | 49 | 5 | 1.001669 | 0007236,0007238,etc |
| low surface brightness | LSB | 47 | 5 | 1.001135 | 0007318,0007221,etc |
| colour magnitude diagram | CMD | 67 | 5 | 2.001757 | 0007394,0007442,etc |
| equivalent width | EW | 118 | 5 | 2.002757 | 0007421,0007041,etc |
| william herschel telescope | WHT | 26 | 5 | 2.00057 | 0007224,0007022,etc |
| horizontal branch | HB | 99 | 5 | 2.003401 | 0007471,0007038,etc |
| wolf rayet | WR | 155 | 5 | 2.00671 | 0007385,0007417,etc |
| hubble deep field | HDF | 90 | 5 | 1.002116 | 0007114,0007315,etc |
| main sequence | MS | 60 | 5 | 1.001696 | 0007239,0007350,etc |
| space telescope imaging spectrograph | STIS | 27 | 5 | 1.000819 | 0007330,0007238,etc |
| dark matter | DM | 100 | 5 | 2.006372 | 0007311,0007120,etc |
| sloan digital sky survey | SDSS | 47 | 4 | 2.001051 | 0007295,0007082,etc |
| european southern observatory | ESO | 21 | 4 | 2.000745 | 0007229,0007301,etc |
| canada france hawaii telescope | CFHT | 20 | 4 | 1.00012 | 0007173,0007063,etc |
| smoothed particle hydrodynamics | SPH | 49 | 4 | 2.001698 | 0007205,0007279,etc |
| large magellanic cloud | LMC | 116 | 4 | 2.002795 | 0007236,0007471,etc |
| small magellanic cloud | SMC | 120 | 4 | 2.008986 | 0007236,0007271,etc |
| far ultraviolet | FUV | 88 | 4 | 2.003947 | 0007318,0007077,etc |
| quasi periodic oscillation | QPO | 122 | 4 | 2.00812 | 0007250,0007460,etc |
| cosmic microwave background radiation | CMBR | 36 | 4 | 1.003671 | 0007218,0007419,etc |
| wide field camera | WFC | 23 | 4 | 1.002151 | 0007280,0007320,etc |
| narrow field instruments | NFI | 17 | 4 | 1.000873 | 0007280,0007320,etc |
| target of opportunity | TOO | 28 | 4 | 2.005006 | 0007280,0007274,etc |
| very large array | VLA | 19 | 4 | 1.000382 | 0007366,0007315,etc |
| equation of state | EOS | 28 | 4 | 1.001371 | 0007004,0007031,etc |
| neutron star | NS | 101 | 4 | 2.002507 | 0007064,0007478,etc |
| position sensitive proportional counter | PSPC | 35 | 4 | 2.001128 | 0007350,0007256,etc |
| high resolution imager | HRI | 53 | 4 | 2.000592 | 0007350,0007468,etc |
| position angle | PA | 20 | 4 | 1.000394 | 0007170,0007018,etc |
| narrow line region | NLR | 85 | 4 | 2.002125 | 0007018,0007467,etc |
| wide field and planetary camera 2 | WFPC2 | 8 | 3 | 1.000219 | 0007219,0007358,etc |
| quasi periodic brightness oscillation | QPO | 106 | 3 | 2.003767 | 0007287,0007234,etc |
| near infrared camera and multi object spectrometer | NICMOS | 40 | 3 | 2.003903 | 0007286,0007330,etc |
| power density spectrum | PDS | 37 | 3 | 2.003785 | 0007092,0007250,etc |
| local standard of rest | LSR | 6 | 3 | 1.000261 | 0007145,0007193,etc |
| spectral energy distributions | SED | 52 | 3 | 1.002657 | 0007434,0007090,etc |
| jacobus kapteyn telescope | JKT | 12 | 3 | 1.000577 | 0007456,0007022,etc |
| space interferometry mission | SIM | 27 | 3 | 2.001606 | 0007160,0007166,etc |
| united kingdom infrared telescope | UKIRT | 16 | 3 | 1.000397 | 0007022,0007475,etc |
| globular cluster | GC | 73 | 3 | 2.001986 | 0007471,0007187,etc |
| white dwarf | WD | 87 | 3 | 2.003773 | 0007058,0007185,etc |
| cataclysmic variable | CV | 33 | 3 | 2.002212 | 0007185,0007009,etc |
| all sky monitor | ASM | 5 | 3 | 1.000194 | 0007071,0007274,etc |
| brightest cluster galaxy | BCG | 32 | 3 | 1.001786 | 0007424,0007126,etc |
| charge transfer efficiency | CTE | 4 | 3 | 1.000202 | 0007150,0007001,etc |
| las campanas redshift survey | LCRS | 38 | 3 | 2.001882 | 0007288,0007012,etc |
| dwarf spheroidal | dSph | 23 | 3 | 1.002098 | 0007006,0007001,etc |
| dwarf irregular | dIrr | 26 | 3 | 2.000744 | 0007006,0007417,etc |
| dwarf elliptical | dE | 15 | 3 | 2.000302 | 0007001,0007417,etc |
| the red giant branch | TRGB | 80 | 3 | 1.002104 | 0007001,0007417,etc |
| adaptive mesh refinement | AMR | 12 | 3 | 1.000449 | 0007332,0007198,etc |
| giant molecular cloud | GMC | 17 | 3 | 1.002107 | 0007149,0007144,etc |
| local interstellar medium | LISM | 78 | 3 | 2.002501 | 0007238,0007172,etc |
| x ray telescope | XRT | 4 | 3 | 1.000213 | 0007255,0007372,etc |
| high energy astrophysics science archive research center | HEASARC | 6 | 3 | 1.000074 | 0007372,0007195,etc |