| active galactic nucleus | AGN | 363 | 24 | 2.00396 | 0009435,0009220,etc |
| cosmic microwave background | CMB | 344 | 23 | 2.003089 | 0009129,0009071,etc |
| spectral energy distribution | SED | 291 | 23 | 1.001653 | 0009220,0009347,etc |
| cold dark matter | CDM | 178 | 21 | 2.003274 | 0009125,0009317,etc |
| point spread function | PSF | 178 | 17 | 2.002939 | 0009097,0009401,etc |
| nasa/ipac extragalactic database | NED | 23 | 16 | 1.000132 | 0009220,0009161,etc |
| luminosity function | LF | 468 | 15 | 2.006128 | 0009125,0009431,etc |
| interstellar medium | ISM | 150 | 14 | 2.003443 | 0009069,0009318,etc |
| hubble space telescope | HST | 63 | 13 | 1.001325 | 0009162,0009208,etc |
| star formation rate | SFR | 138 | 12 | 2.001672 | 0009176,0009312,etc |
| gamma ray burst | GRB | 502 | 11 | 2.00511 | 0009242,0009447,etc |
| low mass x ray binary | LMXB | 71 | 11 | 1.001983 | 0009328,0009183,etc |
| supernova remnant | SNR | 114 | 11 | 2.002624 | 0009250,0009088,etc |
| equivalent width | EW | 64 | 8 | 2.001009 | 0009435,0009148,etc |
| signal to noise ratio | S/N | 27 | 8 | 1.001169 | 0009253,0009380,etc |
| large magellanic cloud | LMC | 149 | 8 | 2.006796 | 0009299,0009318,etc |
| supernova | SN | 481 | 8 | 2.006229 | 0009318,0009176,etc |
| neutron star | NS | 162 | 8 | 2.004778 | 0009434,0009064,etc |
| advection dominated accretion flow | ADAF | 156 | 8 | 1.004298 | 0009207,0009240,etc |
| proportional counter array | PCA | 99 | 7 | 1.002667 | 0009435,0009375,etc |
| infrared space observatory | ISO | 164 | 7 | 2.000966 | 0009440,0009220,etc |
| very large array | VLA | 53 | 7 | 2.001647 | 0009220,0009442,etc |
| cataclysmic variable | CV | 111 | 7 | 2.002683 | 0009472,0009420,etc |
| broad line region | BLR | 106 | 7 | 2.002467 | 0009124,0009083,etc |
| initial mass function | IMF | 160 | 7 | 2.003691 | 0009158,0009007,etc |
| near infrared | NIR | 79 | 7 | 2.001649 | 0009345,0009287,etc |
| quasi periodic oscillation | QPO | 302 | 7 | 2.0075 | 0009354,0009148,etc |
| space telescope imaging spectrograph | STIS | 76 | 7 | 2.002595 | 0009208,0009403,etc |
| hubble deep field | HDF | 70 | 6 | 1.00246 | 0009220,0009068,etc |
| low surface brightness | LSB | 113 | 6 | 1.007532 | 0009018,0009370,etc |
| black hole | BH | 132 | 6 | 2.005827 | 0009253,0009076,etc |
| very long baseline array | VLBA | 120 | 6 | 2.004275 | 0009124,0009079,etc |
| black hole candidate | BHC | 44 | 6 | 2.001331 | 0009434,0009354,etc |
| intracluster medium | ICM | 68 | 6 | 1.001197 | 0009375,0009007,etc |
| signal to noise | S/N | 26 | 6 | 2.000535 | 0009397,0009102,etc |
| far infrared | FIR | 229 | 6 | 2.002999 | 0009454,0009162,etc |
| singular isothermal sphere | SIS | 54 | 6 | 2.000795 | 0009068,0009325,etc |
| full width at half maximum | FWHM | 31 | 6 | 1.00047 | 0009380,0009462,etc |
| main sequence | MS | 52 | 5 | 2.002643 | 0009066,0009401,etc |
| dark matter | DM | 95 | 5 | 1.005751 | 0009125,0009197,etc |
| asymptotic giant branch | AGB | 101 | 5 | 2.003279 | 0009363,0009505,etc |
| james clerk maxwell telescope | JCMT | 13 | 5 | 1.000094 | 0009363,0009151,etc |
| red giant branch | RGB | 60 | 5 | 1.00382 | 0009401,0009090,etc |
| equation of state | EOS | 94 | 5 | 2.004396 | 0009113,0009328,etc |
| white dwarf | WD | 97 | 5 | 1.002985 | 0009312,0009049,etc |
| high velocity cloud | HVC | 56 | 5 | 1.007306 | 0009138,0009190,etc |
| infrared | IR | 339 | 4 | 2.008536 | 0009220,0009146,etc |
| hubble deep field south | HDFS | 27 | 4 | 2.000632 | 0009010,0009345,etc |
| sloan digital sky survey | SDSS | 13 | 4 | 1.000842 | 0009066,0009366,etc |
| zero age main sequence | ZAMS | 56 | 4 | 2.001872 | 0009421,0009458,etc |
| small magellanic cloud | SMC | 51 | 4 | 1.002295 | 0009299,0009155,etc |
| intergalactic medium | IGM | 35 | 4 | 1.001777 | 0009125,0009190,etc |
| rosat all sky survey | RASS | 47 | 4 | 1.002782 | 0009110,0009379,etc |
| international ultraviolet explorer | IUE | 20 | 4 | 1.001268 | 0009363,0009502,etc |
| monte carlo | MC | 20 | 4 | 2.000441 | 0009363,0009224,etc |
| big bang nucleosynthesis | BBN | 61 | 4 | 1.001477 | 0009432,0009475,etc |
| inverse compton | IC | 113 | 4 | 2.002427 | 0009009,0009202,etc |
| planetary nebula | PN | 431 | 4 | 2.009225 | 0009054,0009396,etc |
| rossi x ray timing explorer | RXTE | 33 | 4 | 2.001669 | 0009481,0009194,etc |
| field of view | FOV | 8 | 4 | 1.000316 | 0009013,0009160,etc |
| canada france redshift survey | CFRS | 10 | 3 | 2.000024 | 0009220,0009025,etc |
| two micron all sky survey | 2MASS | 17 | 3 | 2.000894 | 0009220,0009250,etc |
| nrao vla sky survey | NVSS | 8 | 3 | 1.000299 | 0009220,0009260,etc |
| high surface brightness | HSB | 21 | 3 | 1.003898 | 0009018,0009370,etc |
| color magnitude diagram | CMD | 27 | 3 | 2.000795 | 0009066,0009401,etc |
| local thermodynamic equilibrium | LTE | 20 | 3 | 2.001188 | 0009182,0009363,etc |
| truncated isothermal sphere | TIS | 42 | 3 | 1.002332 | 0009125,0009495,etc |
| long wavelength spectrometer | LWS | 29 | 3 | 2.001976 | 0009363,0009428,etc |
| horizontal branch | HB | 92 | 3 | 2.006945 | 0009401,0009183,etc |
| greisen zatsepin kuzmin | GZK | 33 | 3 | 2.000317 | 0009466,0009416,etc |
| position angle | PA | 37 | 3 | 2.001934 | 0009102,0009496,etc |
| galactic center | GC | 46 | 3 | 2.002026 | 0009442,0009445,etc |
| european southern observatory | ESO | 11 | 3 | 2.000327 | 0009442,0009025,etc |
| neutron stars | NS | 57 | 3 | 2.004904 | 0009093,0009282,etc |
| the red giant branch | TRGB | 25 | 3 | 2.002175 | 0009335,0009504,etc |
| synchrotron self compton | SSC | 26 | 3 | 1.003465 | 0009308,0009121,etc |
| false alarm probability | FAP | 12 | 3 | 1.000838 | 0009087,0009423,etc |
| ultraviolet | UV | 11 | 3 | 1.001812 | 0009345,0009151,etc |
| all sky monitor | ASM | 24 | 3 | 2.003683 | 0009354,0009481,etc |
| pre main sequence | PMS | 14 | 3 | 2.000596 | 0009262,0009179,etc |
| magnetohydrodynamic | MHD | 86 | 3 | 2.001542 | 0009088,0009227,etc |
| three dimensional | 3D | 36 | 3 | 2.001904 | 0009088,0009412,etc |
| goddard high resolution spectrograph | GHRS | 20 | 3 | 2.001467 | 0009208,0009190,etc |
| globular cluster | GC | 178 | 3 | 2.006542 | 0009246,0009090,etc |
| star formation | SF | 76 | 3 | 2.003025 | 0009315,0009494,etc |
| sunyaev zel'dovich | SZ | 40 | 3 | 1.003147 | 0009114,0009067,etc |
| high resolution imager | HRI | 96 | 3 | 2.008804 | 0009379,0009238,etc |
| atacama large millimeter array | ALMA | 5 | 3 | 1.000037 | 0009151,0009428,etc |
| soft x ray transient | SXT | 26 | 3 | 1.001135 | 0009148,0009415,etc |
| luminous blue variable | LBV | 12 | 3 | 1.000455 | 0009280,0009027,etc |
| very long baseline interferometry | VLBI | 51 | 3 | 2.000738 | 0009301,0009116,etc |
| cosmic microwave background radiation | CMBR | 64 | 3 | 1.002137 | 0009296,0009061,etc |
| large scale structure | LSS | 38 | 3 | 2.002102 | 0009296,0009057,etc |
| brown dwarf | BD | 28 | 3 | 2.00029 | 0009174,0009216,etc |
| supermassive black hole | SMBH | 73 | 3 | 2.00311 | 0009267,0009441,etc |
| united kingdom infrared telescope | UKIRT | 19 | 3 | 1.000578 | 0009172,0009218,etc |
| extragalactic background light | EBL | 19 | 3 | 2.000622 | 0009369,0009311,etc |
| low energy concentrator spectrometer | LECS | 31 | 3 | 2.000897 | 0009231,0009013,etc |