| interstellar medium | ISM | 212 | 32 | 1.001249 | 0104070,0104121,etc |
| active galactic nucleus | AGN | 451 | 26 | 1.00345 | 0104260,0104183,etc |
| cold dark matter | CDM | 272 | 26 | 2.004459 | 0104017,0104002,etc |
| cosmic microwave background | CMB | 272 | 23 | 1.004343 | 0104300,0104017,etc |
| point spread function | PSF | 135 | 21 | 2.000787 | 0104070,0104125,etc |
| spectral energy distribution | SED | 217 | 20 | 2.001435 | 0104260,0104190,etc |
| initial mass function | IMF | 262 | 20 | 1.002179 | 0104314,0104425,etc |
| supernova remnant | SNR | 439 | 18 | 2.004806 | 0104121,0104420,etc |
| nasa/ipac extragalactic database | NED | 38 | 18 | 1.00037 | 0104235,0104061,etc |
| low mass x ray binary | LMXB | 234 | 16 | 2.002521 | 0104070,0104299,etc |
| luminosity function | LF | 143 | 14 | 2.002011 | 0104183,0104096,etc |
| gamma ray burst | GRB | 671 | 13 | 2.006619 | 0104174,0104128,etc |
| supernova | SN | 610 | 13 | 2.0118 | 0104235,0104425,etc |
| neutron star | NS | 220 | 12 | 2.0033 | 0104470,0104070,etc |
| equivalent width | EW | 84 | 11 | 2.000673 | 0104220,0104125,etc |
| signal to noise ratio | S/N | 84 | 10 | 2.001165 | 0104109,0104125,etc |
| large magellanic cloud | LMC | 296 | 10 | 2.007715 | 0104420,0104214,etc |
| very large array | VLA | 90 | 10 | 2.001987 | 0104235,0104425,etc |
| infrared | IR | 262 | 10 | 2.002818 | 0104061,0104284,etc |
| hubble space telescope | HST | 64 | 9 | 2.001164 | 0104235,0104403,etc |
| broad line region | BLR | 59 | 8 | 1.000634 | 0104260,0104203,etc |
| asymptotic giant branch | AGB | 206 | 8 | 1.003192 | 0104121,0104257,etc |
| color magnitude diagram | CMD | 177 | 8 | 2.003258 | 0104096,0104436,etc |
| star formation rate | SFR | 141 | 8 | 1.002479 | 0104425,0104088,etc |
| white dwarf | WD | 290 | 8 | 2.003658 | 0104095,0104461,etc |
| broad absorption line | BAL | 50 | 7 | 2.001631 | 0104260,0104381,etc |
| full width at half maximum | FWHM | 48 | 7 | 2.001056 | 0104121,0104203,etc |
| narrow line region | NLR | 89 | 7 | 2.004378 | 0104203,0104186,etc |
| proportional counter array | PCA | 57 | 7 | 2.001414 | 0104352,0104468,etc |
| intergalactic medium | IGM | 72 | 7 | 1.000737 | 0104189,0104276,etc |
| ultraviolet | UV | 135 | 7 | 1.002932 | 0104425,0104029,etc |
| magnetohydrodynamic | MHD | 31 | 6 | 1.001026 | 0104206,0104130,etc |
| wolf rayet | WR | 80 | 6 | 2.003511 | 0104330,0104420,etc |
| main sequence | MS | 81 | 6 | 1.002318 | 0104195,0104461,etc |
| signal to noise | S/N | 33 | 6 | 2.00081 | 0104129,0104095,etc |
| far infrared | FIR | 83 | 6 | 2.002482 | 0104203,0104425,etc |
| rossi x ray timing explorer | RXTE | 52 | 6 | 1.001268 | 0104019,0104352,etc |
| all sky monitor | ASM | 35 | 6 | 2.000681 | 0104299,0104395,etc |
| very long baseline array | VLBA | 119 | 6 | 2.004069 | 0104309,0104372,etc |
| red giant branch | RGB | 151 | 6 | 2.004103 | 0104099,0104405,etc |
| near infrared | NIR | 44 | 5 | 2.000802 | 0104122,0104455,etc |
| black hole | BH | 113 | 5 | 2.00706 | 0104070,0104263,etc |
| position sensitive proportional counter | PSPC | 99 | 5 | 2.002499 | 0104203,0104451,etc |
| high resolution imager | HRI | 23 | 5 | 1.000261 | 0104203,0104212,etc |
| canada france hawaii telescope | CFHT | 26 | 5 | 1.000844 | 0104203,0104163,etc |
| inverse compton | IC | 97 | 5 | 2.003385 | 0104128,0104451,etc |
| quasi periodic oscillation | QPO | 420 | 5 | 2.007644 | 0104323,0104008,etc |
| black hole candidate | BHC | 56 | 5 | 2.002387 | 0104323,0104073,etc |
| astronomical image processing system | AIPS | 8 | 5 | 1.000241 | 0104451,0104156,etc |
| san diego supercomputer center | SDSC | 5 | 5 | 1.000088 | 0104256,0104148,etc |
| position angle | PA | 35 | 5 | 2.000341 | 0104214,0104140,etc |
| equation of state | EOS | 34 | 5 | 2.001559 | 0104003,0104078,etc |
| planetary nebula | PN | 117 | 4 | 2.002542 | 0104154,0104096,etc |
| james clerk maxwell telescope | JCMT | 8 | 4 | 1.000092 | 0104312,0104157,etc |
| horizontal branch | HB | 227 | 4 | 2.006107 | 0104129,0104323,etc |
| narrow line seyfert 1 | NLS1 | 68 | 4 | 1.003152 | 0104203,0104125,etc |
| space telescope imaging spectrograph | STIS | 37 | 4 | 1.001492 | 0104125,0104303,etc |
| proportional counter unit | PCU | 18 | 4 | 1.000476 | 0104468,0104323,etc |
| advanced ccd imaging spectrometer | ACIS | 20 | 4 | 1.001613 | 0104270,0104453,etc |
| wide field camera | WFC | 57 | 4 | 1.002139 | 0104299,0104362,etc |
| star formation history | SFH | 114 | 4 | 2.00396 | 0104425,0104286,etc |
| australia telescope compact array | ATCA | 16 | 4 | 1.000325 | 0104348,0104398,etc |
| greisen zatsepin kuzmin | GZK | 12 | 4 | 1.000336 | 0104033,0104291,etc |
| innermost stable circular orbit | ISCO | 50 | 4 | 2.001494 | 0104487,0104408,etc |
| wide field planetary camera 2 | WFPC2 | 44 | 4 | 2.0009 | 0104168,0104005,etc |
| young stellar object | YSO | 12 | 3 | 1.000387 | 0104190,0104318,etc |
| extensive air shower | EAS | 34 | 3 | 2.000545 | 0104338,0104282,etc |
| low surface brightness | LSB | 48 | 3 | 2.002596 | 0104396,0104111,etc |
| rotation measure | RM | 75 | 3 | 2.003918 | 0104312,0104384,etc |
| low resolution imaging spectrograph | LRIS | 6 | 3 | 1.000277 | 0104129,0104108,etc |
| supernova/acceleration probe | SNAP | 62 | 3 | 2.00398 | 0104009,0104455,etc |
| luminous blue variable | LBV | 16 | 3 | 1.001479 | 0104420,0104235,etc |
| high energy transmission grating spectrometer | HETGS | 21 | 3 | 1.00018 | 0104125,0104252,etc |
| high energy grating | HEG | 10 | 3 | 1.00021 | 0104125,0104035,etc |
| medium energy grating | MEG | 20 | 3 | 1.000637 | 0104125,0104035,etc |
| burst and transient source experiment | BATSE | 16 | 3 | 1.001834 | 0104468,0104208,etc |
| compton gamma ray observatory | CGRO | 8 | 3 | 2.000469 | 0104208,0104232,etc |
| milky way | MW | 10 | 3 | 1.002067 | 0104189,0104068,etc |
| star formation | SF | 176 | 3 | 2.001859 | 0104425,0104016,etc |
| probability distribution function | PDF | 36 | 3 | 2.002851 | 0104141,0104361,etc |
| cosmic microwave background radiation | CMBR | 14 | 3 | 2.00084 | 0104200,0104033,etc |
| planetary camera | PC | 24 | 3 | 2.00062 | 0104316,0104168,etc |
| near infrared camera and multi object spectrometer | NICMOS | 41 | 3 | 2.001463 | 0104316,0104399,etc |
| sloan digital sky survey | SDSS | 16 | 3 | 1.001755 | 0104201,0104361,etc |
| phoswich detector system | PDS | 15 | 3 | 2.001422 | 0104451,0104362,etc |
| ultra high energy cosmic ray | UHECR | 61 | 3 | 2.000671 | 0104090,0104291,etc |
| cosmic ray | CR | 48 | 3 | 2.004083 | 0104324,0104133,etc |
| large scale structure | LSS | 11 | 3 | 2.000334 | 0104015,0104460,etc |
| ultraluminous infrared galaxy | ULIG | 89 | 3 | 2.003225 | 0104157,0104169,etc |
| optical transient | OT | 41 | 3 | 2.001467 | 0104249,0104363,etc |
| cataclysmic variable | CV | 150 | 3 | 2.004733 | 0104010,0104031,etc |
| kolmogorov smirnov | K-S | 12 | 3 | 1.000187 | 0104453,0104433,etc |
| anomalous x ray pulsar | AXP | 162 | 3 | 2.0084 | 0104348,0104199,etc |
| circumstellar material | CSM | 19 | 3 | 1.0004 | 0104348,0104215,etc |
| rosat all sky survey | RASS | 7 | 3 | 1.000364 | 0104369,0104387,etc |
| nordic optical telescope | NOT | 10 | 3 | 1.00079 | 0104140,0104363,etc |
| monte carlo | MC | 19 | 3 | 1.000879 | 0104248,0104406,etc |
| colour magnitude diagram | CMD | 23 | 3 | 1.001215 | 0104016,0104178,etc |
| simple stellar population | SSP | 6 | 3 | 1.000242 | 0104084,0104328,etc |
| intracluster medium | ICM | 40 | 3 | 1.004822 | 0104328,0104422,etc |
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