| spectral energy distribution | SED | 304 | 24 | 1.002614 | 9906495,9906135,etc |
| active galactic nucleus | AGN | 197 | 22 | 1.001961 | 9906504,9906135,etc |
| point spread function | PSF | 110 | 20 | 2.000913 | 9906019,9906282,etc |
| star formation rate | SFR | 259 | 19 | 1.003751 | 9906196,9906335,etc |
| cold dark matter | CDM | 361 | 18 | 2.004396 | 9906297,9906174,etc |
| interstellar medium | ISM | 197 | 17 | 2.001306 | 9906372,9906191,etc |
| cosmic microwave background | CMB | 217 | 16 | 2.002772 | 9906272,9906212,etc |
| initial mass function | IMF | 325 | 15 | 1.003973 | 9906121,9906175,etc |
| luminosity function | LF | 157 | 12 | 1.002624 | 9906019,9906236,etc |
| gamma ray burst | GRB | 427 | 11 | 2.005928 | 9906333,9906395,etc |
| hubble space telescope | HST | 76 | 10 | 1.001603 | 9906452,9906262,etc |
| supernova remnant | SNR | 91 | 9 | 2.001881 | 9906169,9906118,etc |
| nasa/ipac extragalactic database | NED | 12 | 9 | 1.000088 | 9906074,9906023,etc |
| very large array | VLA | 70 | 8 | 2.000869 | 9906495,9906135,etc |
| color magnitude diagram | CMD | 232 | 7 | 1.003175 | 9906465,9906121,etc |
| inverse compton | IC | 131 | 7 | 2.00362 | 9906272,9906212,etc |
| very high energy | VHE | 156 | 7 | 2.002871 | 9906405,9906137,etc |
| white dwarf | WD | 127 | 7 | 1.003974 | 9906192,9906472,etc |
| extremely red object | ERO | 44 | 6 | 2.002388 | 9906196,9906311,etc |
| horizontal branch | HB | 307 | 6 | 2.008141 | 9906121,9906452,etc |
| red giant branch | RGB | 109 | 6 | 1.001191 | 9906121,9906452,etc |
| dark matter | DM | 124 | 6 | 2.002237 | 9906083,9906103,etc |
| cosmic microwave background radiation | CMBR | 73 | 6 | 2.002898 | 9906311,9906246,etc |
| local thermodynamic equilibrium | LTE | 93 | 6 | 1.005271 | 9906494,9906180,etc |
| all sky monitor | ASM | 51 | 6 | 1.002916 | 9906087,9906150,etc |
| sloan digital sky survey | SDSS | 18 | 6 | 1.000742 | 9906246,9906399,etc |
| hubble deep field | HDF | 28 | 6 | 2.002141 | 9906399,9906469,etc |
| young stellar object | YSO | 45 | 5 | 2.000724 | 9906495,9906167,etc |
| field of view | FOV | 17 | 5 | 1.000595 | 9906495,9906357,etc |
| position angle | PA | 19 | 5 | 1.000287 | 9906135,9906048,etc |
| equivalent width | eV | 129 | 5 | 1.004608 | 9906294,9906434,etc |
| narrow line region | NLR | 66 | 5 | 2.002532 | 9906294,9906074,etc |
| intergalactic medium | IGM | 94 | 5 | 2.001497 | 9906413,9906287,etc |
| main sequence | MS | 54 | 5 | 1.001909 | 9906121,9906452,etc |
| equation of state | EOS | 64 | 5 | 2.001754 | 9906333,9906248,etc |
| asymptotic giant branch | AGB | 292 | 5 | 2.00592 | 9906452,9906248,etc |
| signal to noise | S/N | 45 | 5 | 2.000446 | 9906468,9906189,etc |
| pre main sequence | PMS | 10 | 4 | 1.000229 | 9906495,9906382,etc |
| intermediate frequency | IF | 16 | 4 | 1.000478 | 9906504,9906321,etc |
| far infrared | FIR | 32 | 4 | 2.00255 | 9906282,9906003,etc |
| probability distribution function | PDF | 127 | 4 | 2.005955 | 9906296,9906395,etc |
| signal to noise ratio | SNR | 12 | 4 | 1.000203 | 9906372,9906452,etc |
| rotation measure | RM | 38 | 4 | 2.001117 | 9906372,9906186,etc |
| united kingdom infrared telescope | UKIRT | 10 | 4 | 1.0003 | 9906447,9906175,etc |
| near infrared | NIR | 67 | 4 | 2.003003 | 9906436,9906079,etc |
| fast fourier transform | FFT | 13 | 4 | 1.000418 | 9906115,9906371,etc |
| cosmic ray | CR | 147 | 4 | 2.003062 | 9906169,9906083,etc |
| optical transient | OT | 44 | 4 | 2.002154 | 9906395,9906096,etc |
| photomultiplier tube | PMT | 60 | 4 | 1.001606 | 9906118,9906203,etc |
| large magellanic cloud | LMC | 57 | 4 | 2.001255 | 9906457,9906222,etc |
| full width at half maximum | FWHM | 15 | 4 | 2.000321 | 9906468,9906297,etc |
| burst and transient source experiment | BATSE | 35 | 4 | 2.001 | 9906394,9906096,etc |
| supernova | SN | 668 | 4 | 2.008924 | 9906096,9906206,etc |
| wide field planetary camera 2 | WFPC2 | 69 | 4 | 2.000727 | 9906484,9906206,etc |
| very long baseline array | VLBA | 38 | 3 | 2.001091 | 9906495,9906199,etc |
| landau pomeranchuk migdal | LPM | 23 | 3 | 2.003092 | 9906504,9906347,etc |
| phoswich detector system | PDS | 48 | 3 | 1.001613 | 9906476,9906162,etc |
| globular cluster | GC | 327 | 3 | 2.009633 | 9906465,9906452,etc |
| ultraluminous infrared galaxy | ULIRG | 23 | 3 | 2.000618 | 9906196,9906493,etc |
| weakly interacting massive particle | WIMP | 9 | 3 | 1.001086 | 9906230,9906203,etc |
| dispersion measure | DM | 19 | 3 | 1.000634 | 9906372,9906373,etc |
| cataclysmic variable | CV | 66 | 3 | 2.003893 | 9906011,9906443,etc |
| wide field and planetary camera 2 | WFPC2 | 13 | 3 | 1.000229 | 9906335,9906462,etc |
| intracluster medium | ICM | 47 | 3 | 2.000897 | 9906335,9906357,etc |
| kitt peak national observatory | KPNO | 6 | 3 | 1.000151 | 9906357,9906220,etc |
| ultraviolet | UV | 68 | 3 | 2.000558 | 9906284,9906399,etc |
| gas imaging spectrometer | GIS | 42 | 3 | 2.001686 | 9906294,9906364,etc |
| broad line region | BLR | 32 | 3 | 2.004233 | 9906294,9906377,etc |
| particle mesh | PM | 22 | 3 | 2.00007 | 9906413,9906155,etc |
| kolmogorov smirnov | KS | 8 | 3 | 1.000186 | 9906466,9906163,etc |
| piecewise parabolic method | PPM | 25 | 3 | 1.00061 | 9906333,9906297,etc |
| astronomical image processing system | AIPS | 8 | 3 | 1.000528 | 9906199,9906321,etc |
| standard cold dark matter | SCDM | 60 | 3 | 2.001529 | 9906032,9906169,etc |
| young stellar objects | YSO | 15 | 3 | 1.000025 | 9906436,9906105,etc |
| infrared space observatory | ISO | 18 | 3 | 1.000424 | 9906436,9906166,etc |
| extreme ultraviolet | EUV | 54 | 3 | 1.001877 | 9906191,9906272,etc |
| ultra high energy cosmic ray | UHECR | 28 | 3 | 2.000322 | 9906212,9906338,etc |
| intra cluster medium | ICM | 19 | 3 | 1.00316 | 9906169,9906329,etc |
| proportional counter array | PCA | 9 | 3 | 1.000224 | 9906178,9906122,etc |
| international ultraviolet explorer | IUE | 25 | 3 | 1.000565 | 9906130,9906068,etc |
| european southern observatory | ESO | 17 | 3 | 1.001804 | 9906319,9906409,etc |
| black hole | BH | 22 | 3 | 1.00196 | 9906330,9906472,etc |
| polycyclic aromatic hydrocarbon | PAH | 9 | 3 | 1.000134 | 9906444,9906332,etc |
| local group | LG | 15 | 3 | 2.000563 | 9906290,9906352,etc |
| gamma ray bursts | GRB | 51 | 3 | 2.006344 | 9906203,9906268,etc |
| low mass x ray binary | LMXB | 12 | 3 | 1.000748 | 9906434,9906045,etc |
| san diego supercomputer center | SDSC | 3 | 3 | 1.000016 | 9906016,9906238,etc |
| magnetohydrodynamic | MHD | 13 | 3 | 2.000276 | 9906338,9906223,etc |
| space interferometry mission | SIM | 26 | 3 | 1.00299 | 9906472,9906126,etc |
| ultra luminous infrared galaxy | ULIRG | 43 | 3 | 2.002352 | 9906493,9906332,etc |
| rosat all sky survey | RASS | 13 | 3 | 2.002019 | 9906163,9906316,etc |
| james clerk maxwell telescope | JCMT | 6 | 3 | 1.000273 | 9906281,9906274,etc |
| press schechter | PS | 30 | 3 | 1.001654 | 9906204,9906093,etc |
| cerro tololo interamerican observatory | CTIO | 40 | 3 | 1.002465 | 9906173,9906316,etc |
| synchrotron self compton | SSC | 10 | 3 | 1.00071 | 9906202,9906242,etc |
| national center for supercomputing applications | NCSA | 4 | 3 | 1.000018 | 9906160,9906238,etc |
| energetic gamma ray experiment telescope | EGRET | 95 | 3 | 2.001874 | 9906373,9906150,etc |
| microwave anisotropy probe | MAP | 11 | 3 | 1.000489 | 9906301,9906044,etc |