| 1 | period luminosity | PL | 201 | 9 | 1.002219 | 0303325,0303101,etc |
| 2 | space telescope imaging spectrograph | STIS | 267 | 9 | 2.006636 | 0303102,0303500,etc |
| 3 | proportional counter array | PCA | 32 | 9 | 2.000612 | 0303664,0303136,etc |
| 4 | friedmann robertson walker | FRW | 80 | 8 | 2.001673 | 0303150,0303497,etc |
| 5 | low surface brightness | LSB | 41 | 7 | 1.001163 | 0303416,0303052,etc |
| 6 | star formation history | SFH | 87 | 7 | 1.00137 | 0303190,0303331,etc |
| 7 | colour magnitude diagram | CMD | 175 | 7 | 1.004454 | 0303057,0303536,etc |
| 8 | advanced camera for surveys | ACS | 23 | 6 | 1.000689 | 0303167,0303605,etc |
| 9 | high energy transmission grating spectrometer | HETGS | 25 | 5 | 1.001004 | 0303387,0303277,etc |
| 10 | european photon imaging camera | EPIC | 21 | 5 | 1.000931 | 0303051,0303380,etc |
| 11 | advanced ccd imaging spectrometer | ACIS | 20 | 5 | 1.000651 | 0303597,0303314,etc |
| 12 | x ray luminosity function | XLF | 19 | 4 | 1.001132 | 0303387,0303167,etc |
| 13 | kolmogorov smirnov | KS | 15 | 4 | 1.000316 | 0303302,0303493,etc |
| 14 | tully fisher | TF | 36 | 4 | 2.000385 | 0303558,0303190,etc |
| 15 | two dimensional | 2D | 33 | 4 | 2.000631 | 0303171,0303503,etc |
| 16 | sunyaev zel'dovich | SZ | 176 | 4 | 2.004597 | 0303519,0303510,etc |
| 17 | intra cluster medium | ICM | 15 | 4 | 1.000619 | 0303609,0303157,etc |
| 18 | inverse compton | IC | 46 | 4 | 1.002104 | 0303107,0303593,etc |
| 19 | herbig haro | HH | 36 | 4 | 2.000561 | 0303604,0303500,etc |
| 20 | the red giant branch | TRGB | 72 | 4 | 2.003248 | 0303101,0303203,etc |
| 21 | main sequence turn off | MSTO | 12 | 4 | 2.000882 | 0303331,0303511,etc |
| 22 | quasiperiodic oscillation | QPO | 106 | 4 | 2.006044 | 0303665,0303421,etc |
| 23 | galactic globular cluster | GGC | 35 | 3 | 1.000606 | 0303325,0303493,etc |
| 24 | greisen zatsepin kuzmin | GZK | 86 | 3 | 2.002722 | 0303233,0303271,etc |
| 25 | three dimensional | 3D | 12 | 3 | 1.000545 | 0303171,0303460,etc |
| 26 | dwarf spheroidal | dSph | 41 | 3 | 1.000929 | 0303493,0303011,etc |
| 27 | rosat all sky survey | RASS | 34 | 3 | 1.000411 | 0303106,0303380,etc |
| 28 | particle mesh | PM | 19 | 3 | 2.000593 | 0303130,0303355,etc |
| 29 | wiyn open cluster study | WOCS | 3 | 3 | 1.000241 | 0303631,0303632,etc |
| 30 | orion nebula cluster | ONC | 36 | 3 | 2.002659 | 0303631,0303199,etc |
| 31 | high frequency instrument | HFI | 10 | 3 | 2.000384 | 0303645,0303510,etc |
| 32 | sunyaev zeldovich | SZ | 155 | 3 | 2.003287 | 0303007,0303587,etc |
| 33 | very massive star | VMS | 20 | 3 | 1.001662 | 0303007,0303584,etc |
| 34 | inter galactic medium | IGM | 6 | 3 | 1.000042 | 0303131,0303251,etc |
| 35 | dwarf elliptical | dE | 165 | 3 | 2.002591 | 0303359,0303391,etc |
| 36 | all sky monitor | ASM | 33 | 3 | 2.002538 | 0303402,0303379,etc |
| 37 | power density spectrum | PDS | 25 | 3 | 1.000462 | 0303402,0303582,etc |
| 38 | rayleigh jeans | RJ | 24 | 3 | 2.00055 | 0303510,0303262,etc |
| 39 | proportional counter unit | PCU | 14 | 3 | 2.00065 | 0303133,0303421,etc |
| 40 | wolf rayet | WR | 111 | 3 | 2.007005 | 0303621,0303540,etc |
| 41 | collisional ionization equilibrium | CIE | 24 | 3 | 2.001417 | 0303322,0303264,etc |
| 42 | signal to noise | S/N | 18 | 3 | 2.000225 | 0303619,0303152,etc |
| 43 | reflection grating spectrometer | RGS | 43 | 3 | 2.002253 | 0303147,0303425,etc |
| 44 | non equilibrium ionization | NEI | 28 | 3 | 2.001498 | 0303069,0303264,etc |