| signal to noise | S/N | 27 | 8 | 1.000365 | 0007030,0007063,etc |
| proportional counter array | PCA | 81 | 7 | 2.000989 | 0007092,0007250,etc |
| kolmogorov smirnov | KS | 26 | 6 | 1.000487 | 0007219,0007030,etc |
| wide field planetary camera 2 | WFPC2 | 67 | 6 | 1.000706 | 0007114,0007228,etc |
| goddard high resolution spectrograph | GHRS | 49 | 5 | 1.001669 | 0007236,0007238,etc |
| low surface brightness | LSB | 47 | 5 | 1.001135 | 0007318,0007221,etc |
| colour magnitude diagram | CMD | 67 | 5 | 2.001757 | 0007394,0007442,etc |
| wolf rayet | WR | 155 | 5 | 2.00671 | 0007385,0007417,etc |
| space telescope imaging spectrograph | STIS | 27 | 5 | 1.000819 | 0007330,0007238,etc |
| wide field camera | WFC | 23 | 4 | 1.002151 | 0007280,0007320,etc |
| narrow field instruments | NFI | 17 | 4 | 1.000873 | 0007280,0007320,etc |
| high resolution imager | HRI | 53 | 4 | 2.000592 | 0007350,0007468,etc |
| wide field and planetary camera 2 | WFPC2 | 8 | 3 | 1.000219 | 0007219,0007358,etc |
| quasi periodic brightness oscillation | QPO | 106 | 3 | 2.003767 | 0007287,0007234,etc |
| near infrared camera and multi object spectrometer | NICMOS | 40 | 3 | 2.003903 | 0007286,0007330,etc |
| power density spectrum | PDS | 37 | 3 | 2.003785 | 0007092,0007250,etc |
| space interferometry mission | SIM | 27 | 3 | 2.001606 | 0007160,0007166,etc |
| all sky monitor | ASM | 5 | 3 | 1.000194 | 0007071,0007274,etc |
| charge transfer efficiency | CTE | 4 | 3 | 1.000202 | 0007150,0007001,etc |
| dwarf spheroidal | dSph | 23 | 3 | 1.002098 | 0007006,0007001,etc |
| dwarf irregular | dIrr | 26 | 3 | 2.000744 | 0007006,0007417,etc |
| dwarf elliptical | dE | 15 | 3 | 2.000302 | 0007001,0007417,etc |
| the red giant branch | TRGB | 80 | 3 | 1.002104 | 0007001,0007417,etc |
| local interstellar medium | LISM | 78 | 3 | 2.002501 | 0007238,0007172,etc |