| 1 | interstellar medium | ISM | 216 | 13 | 2.002413 | 9706109,9706089,etc |
| 2 | active galactic nucleus | AGN | 175 | 12 | 2.003346 | 9706300,9706254,etc |
| 3 | far infrared | FIR | 220 | 12 | 2.003397 | 9706183,9706253,etc |
| 4 | cosmic microwave background | CMB | 117 | 9 | 1.002854 | 9706159,9706077,etc |
| 5 | supernova remnant | SNR | 253 | 8 | 2.001979 | 9706183,9706051,etc |
| 6 | large magellanic cloud | LMC | 104 | 8 | 2.002688 | 9706152,9706285,etc |
| 7 | point spread function | PSF | 127 | 8 | 2.003224 | 9706285,9706225,etc |
| 8 | initial mass function | IMF | 49 | 7 | 1.001327 | 9706109,9706223,etc |
| 9 | equivalent width | EW | 52 | 6 | 2.000543 | 9706188,9706297,etc |
| 10 | low mass x ray binary | LMXRB | 39 | 6 | 2.000515 | 9706009,9706183,etc |
| 11 | spectral energy distribution | SED | 40 | 6 | 2.001493 | 9706082,9706205,etc |
| 12 | nasa/ipac extragalactic database | NED | 7 | 6 | 1.000064 | 9706183,9706194,etc |
| 13 | neutron star | NS | 130 | 5 | 2.003892 | 9706200,9706076,etc |
| 14 | big bang nucleosynthesis | BBN | 46 | 5 | 2.001439 | 9706115,9706077,etc |
| 15 | intergalactic medium | IGM | 50 | 5 | 1.002671 | 9706087,9706296,etc |
| 16 | cold dark matter | CDM | 16 | 5 | 1.000419 | 9706087,9706034,etc |
| 17 | near infrared | NIR | 38 | 5 | 2.001717 | 9706103,9706112,etc |
| 18 | star formation rate | SFR | 64 | 5 | 2.00099 | 9706197,9706260,etc |
| 19 | full width at half maximum | FWHM | 15 | 5 | 1.000062 | 9706260,9706049,etc |
| 20 | low energy concentrator spectrometer | LECS | 48 | 4 | 1.002679 | 9706188,9706009,etc |
| 21 | gamma ray burst | GRB | 130 | 4 | 2.007276 | 9706060,9706174,etc |
| 22 | color magnitude diagram | CMD | 28 | 4 | 1.002931 | 9706183,9706238,etc |
| 23 | infrared astronomical satellite | IRAS | 31 | 4 | 2.001421 | 9706254,9706260,etc |
| 24 | broad line region | BLR | 100 | 4 | 1.001921 | 9706103,9706264,etc |
| 25 | supernova | SN | 216 | 4 | 2.006121 | 9706138,9706235,etc |
| 26 | small magellanic cloud | SMC | 195 | 4 | 2.00592 | 9706104,9706121,etc |
| 27 | hubble space telescope | HST | 19 | 3 | 1.000719 | 9706109,9706072,etc |
| 28 | equivalent widths | EW | 28 | 3 | 2.000853 | 9706109,9706004,etc |
| 29 | luminosity function | LF | 43 | 3 | 1.002368 | 9706022,9706197,etc |
| 30 | all sky monitor | ASM | 39 | 3 | 2.0022 | 9706009,9706110,etc |
| 31 | star formation rates | SFR | 12 | 3 | 1.000791 | 9706223,9706255,etc |
| 32 | rosat all sky survey | RASS | 97 | 3 | 2.005959 | 9706102,9706166,etc |
| 33 | sloan digital sky survey | SDSS | 16 | 3 | 1.001024 | 9706159,9706119,etc |
| 34 | dwarf irregular | dI | 23 | 3 | 1.001286 | 9706183,9706197,etc |
| 35 | main sequence | MS | 5 | 3 | 1.000552 | 9706183,9706197,etc |
| 36 | color magnitude | CM | 37 | 3 | 2.001126 | 9706183,9706194,etc |
| 37 | asymptotic giant branch | AGB | 31 | 3 | 1.002137 | 9706205,9706048,etc |
| 38 | period luminosity | PL | 67 | 3 | 2.001904 | 9706097,9706096,etc |
| 39 | low surface brightness | LSB | 37 | 3 | 1.001956 | 9706230,9706194,etc |
| 40 | neutron stars | NS | 46 | 3 | 2.005473 | 9706162,9706002,etc |
| 41 | intracluster medium | ICM | 110 | 3 | 2.004489 | 9706107,9706138,etc |
| 42 | two dimensional | 2D | 14 | 3 | 1.000062 | 9706043,9706132,etc |
| 43 | very high energy | VHE | 23 | 3 | 2.001685 | 9706144,9706143,etc |
| 44 | equation of state | EOS | 75 | 3 | 2.002313 | 9706148,9706259,etc |
| 45 | local thermodynamic equilibrium | LTE | 60 | 3 | 2.005795 | 9706006,9706008,etc |
| 46 | quasi periodic oscillation | QPO | 81 | 3 | 1.007333 | 9706100,9706049,etc |
| 47 | rossi x ray timing explorer | RXTE | 15 | 3 | 1.00045 | 9706100,9706134,etc |
| 48 | ultraviolet | UV | 89 | 3 | 2.007948 | 9706127,9706261,etc |
| 49 | narrow line region | NLR | 12 | 3 | 1.000313 | 9706264,9706189,etc |
| 50 | hubble deep field | HDF | 22 | 3 | 1.002085 | 9706255,9706130,etc |
| 51 | wolf rayet | WR | 16 | 3 | 2.000228 | 9706235,9706122,etc |
| 52 | burst and transient source experiment | BATSE | 11 | 3 | 2.001436 | 9706021,9706135,etc |
| 53 | particle mesh | PM | 205 | 3 | 2.003042 | 9706286,9706099,etc |
| 54 | new technology telescope | NTT | 11 | 3 | 2.000304 | 9706048,9706303,etc |
| 55 | infrared space observatory | ISO | 5 | 3 | 1.000512 | 9706211,9706261,etc |