| point spread function | PSF | 272 | 26 | 2.002502 | 9909097,9909109,etc |
| hubble space telescope | HST | 140 | 19 | 1.001289 | 9909097,9909109,etc |
| spectral energy distribution | SED | 100 | 19 | 1.001983 | 9909101,9909476,etc |
| nasa/ipac extragalactic database | NED | 32 | 19 | 1.000246 | 9909101,9909222,etc |
| star formation rate | SFR | 204 | 16 | 2.001813 | 9909092,9909290,etc |
| cosmic microwave background | CMB | 240 | 16 | 2.002297 | 9909222,9909497,etc |
| cold dark matter | CDM | 112 | 15 | 1.001372 | 9909279,9909124,etc |
| initial mass function | IMF | 85 | 14 | 2.000493 | 9909092,9909402,etc |
| active galactic nucleus | AGN | 239 | 14 | 2.005977 | 9909390,9909495,etc |
| large magellanic cloud | LMC | 437 | 13 | 2.0038 | 9909080,9909136,etc |
| gamma ray burst | GRB | 683 | 13 | 1.008212 | 9909101,9909043,etc |
| red giant branch | RGB | 241 | 11 | 2.003209 | 9909408,9909198,etc |
| color magnitude diagram | CMD | 271 | 10 | 1.001788 | 9909325,9909408,etc |
| horizontal branch | HB | 469 | 10 | 1.009024 | 9909408,9909404,etc |
| luminosity function | LF | 242 | 10 | 1.005104 | 9909408,9909223,etc |
| tully fisher | TF | 494 | 10 | 2.004687 | 9909064,9909120,etc |
| equivalent width | EW | 44 | 10 | 1.000707 | 9909388,9909208,etc |
| interstellar medium | ISM | 46 | 9 | 2.003607 | 9909506,9909416,etc |
| supernova remnant | SNR | 262 | 9 | 2.007305 | 9909415,9909355,etc |
| supernova | SN | 620 | 9 | 2.01035 | 9909002,9909140,etc |
| asymptotic giant branch | AGB | 245 | 8 | 2.004934 | 9909408,9909506,etc |
| fundamental plane | FP | 115 | 8 | 1.006521 | 9909222,9909134,etc |
| proportional counter array | PCA | 47 | 8 | 1.000688 | 9909388,9909239,etc |
| hubble deep field | HDF | 60 | 7 | 1.003289 | 9909092,9909088,etc |
| planetary nebula | PN | 217 | 7 | 2.004506 | 9909506,9909516,etc |
| dark matter | DM | 89 | 7 | 2.001529 | 9909012,9909372,etc |
| south atlantic anomaly | SAA | 9 | 7 | 1.000083 | 9909388,9909239,etc |
| globular cluster | GC | 328 | 7 | 2.006433 | 9909446,9909516,etc |
| very large array | VLA | 34 | 7 | 1.000529 | 9909407,9909365,etc |
| low surface brightness | LSB | 280 | 7 | 2.006678 | 9909120,9909129,etc |
| far infrared | FIR | 166 | 6 | 1.004745 | 9909420,9909387,etc |
| low mass x ray binary | LMXB | 44 | 6 | 2.00119 | 9909515,9909138,etc |
| rosat all sky survey | RASS | 41 | 6 | 2.00152 | 9909451,9909390,etc |
| field of view | FOV | 27 | 6 | 2.001191 | 9909457,9909274,etc |
| star formation | SF | 137 | 6 | 2.002276 | 9909495,9909140,etc |
| near infrared | NIR | 104 | 6 | 2.001053 | 9909002,9909402,etc |
| main sequence | MS | 123 | 6 | 2.001815 | 9909073,9909216,etc |
| high surface brightness | HSB | 105 | 6 | 1.002336 | 9909129,9909401,etc |
| position angle | PA | 114 | 5 | 1.003316 | 9909351,9909329,etc |
| ultraluminous infrared galaxy | ULIRG | 163 | 5 | 1.003804 | 9909420,9909217,etc |
| all sky monitor | ASM | 25 | 5 | 2.001017 | 9909388,9909449,etc |
| intracluster medium | ICM | 80 | 5 | 2.002022 | 9909457,9909308,etc |
| neutron star | NS | 168 | 5 | 2.004803 | 9909133,9909326,etc |
| particle mesh | PM | 21 | 4 | 2.000719 | 9909279,9909057,etc |
| small magellanic cloud | SMC | 51 | 4 | 1.00157 | 9909080,9909402,etc |
| australia telescope compact array | ATCA | 13 | 4 | 1.002568 | 9909080,9909095,etc |
| full width at half maximum | FWHM | 24 | 4 | 1.00089 | 9909109,9909102,etc |
| canada france hawaii telescope | CFHT | 28 | 4 | 1.000664 | 9909408,9909342,etc |
| equation of state | EOS | 33 | 4 | 1.001844 | 9909499,9909100,etc |
| cataclysmic variable | CV | 53 | 4 | 2.003578 | 9909175,9909173,etc |
| quasi periodic oscillation | QPO | 193 | 4 | 2.016278 | 9909515,9909488,etc |
| burst and transient source experiment | BATSE | 27 | 4 | 1.000321 | 9909388,9909002,etc |
| high energy x ray timing experiment | HEXTE | 9 | 4 | 1.000181 | 9909388,9909239,etc |
| proportional counter unit | PCU | 21 | 4 | 1.0006 | 9909388,9909023,etc |
| big bang nucleosynthesis | BBN | 20 | 4 | 2.001223 | 9909021,9909061,etc |
| giant molecular cloud | GMC | 37 | 4 | 2.002391 | 9909395,9909047,etc |
| young stellar object | YSO | 60 | 4 | 2.001586 | 9909224,9909387,etc |
| infrared | IR | 66 | 4 | 2.002885 | 9909416,9909432,etc |
| rossi x ray timing explorer | RXTE | 99 | 4 | 2.002865 | 9909239,9909133,etc |
| broad line region | BLR | 139 | 4 | 1.002327 | 9909215,9909105,etc |
| star formation history | SFH | 101 | 4 | 2.001487 | 9909402,9909401,etc |
| wide field planetary camera 2 | WFPC2 | 28 | 4 | 1.000848 | 9909260,9909371,etc |
| singular isothermal sphere | SIS | 14 | 4 | 1.001414 | 9909494,9909518,etc |
| anglo australian telescope | AAT | 6 | 4 | 1.000182 | 9909095,9909230,etc |
| broad absorption line | BAL | 58 | 4 | 2.004735 | 9909361,9909230,etc |
| submillimetre common user bolometer array | SCUBA | 66 | 3 | 1.002015 | 9909092,9909494,etc |
| galactic center | GC | 84 | 3 | 1.003532 | 9909408,9909411,etc |
| full widths at half maximum | FWHM | 20 | 3 | 1.000639 | 9909053,9909316,etc |
| low resolution imaging spectrograph | LRIS | 17 | 3 | 1.00037 | 9909476,9909360,etc |
| signal to noise ratio | S/N | 9 | 3 | 1.000311 | 9909476,9909206,etc |
| inner lindblad resonance | ILR | 35 | 3 | 2.002381 | 9909489,9909093,etc |
| gas imaging spectrometer | GIS | 28 | 3 | 1.000993 | 9909243,9909274,etc |
| hubble deep field south | HDF-S | 12 | 3 | 1.002708 | 9909045,9909095,etc |
| x ray background | XRB | 34 | 3 | 1.002893 | 9909390,9909290,etc |
| zero age main sequence | ZAMS | 16 | 3 | 1.000973 | 9909416,9909149,etc |
| nearby optical galaxy | NOG | 51 | 3 | 2.005565 | 9909444,9909255,etc |
| quasi periodic oscillations | QPO | 226 | 3 | 2.001164 | 9909133,9909472,etc |
| period luminosity | PL | 10 | 3 | 1.000347 | 9909198,9909260,etc |
| photodissociation region | PDR | 9 | 3 | 1.000185 | 9909496,9909327,etc |
| common envelope | CE | 22 | 3 | 2.000575 | 9909516,9909149,etc |
| apache point observatory | APO | 17 | 3 | 2.000545 | 9909263,9909401,etc |
| double imaging spectrograph | DIS | 4 | 3 | 1.000111 | 9909263,9909169,etc |
| two micron all sky survey | 2MASS | 41 | 3 | 2.001965 | 9909263,9909127,etc |
| cosmic background explorer | COBE | 6 | 3 | 1.000266 | 9909214,9909076,etc |
| position sensitive proportional counter | PSPC | 45 | 3 | 2.002251 | 9909274,9909106,etc |
| supermassive star | SMS | 79 | 3 | 2.003715 | 9909237,9909419,etc |
| zero age hb | ZAHB | 21 | 3 | 1.001018 | 9909289,9909371,etc |
| ultraviolet | UV | 41 | 3 | 2.000972 | 9909432,9909477,etc |
| standard cdm | SCDM | 22 | 3 | 1.000723 | 9909273,9909126,etc |
| brightest cluster galaxy | BCG | 5 | 3 | 1.000442 | 9909309,9909397,etc |
| intra cluster medium | ICM | 33 | 3 | 1.000926 | 9909180,9909259,etc |