Astronomy Abbreviations
| Abbrev |
Meaning |
| DN |
dark nebula |
| DSO |
deep-sky object |
| EG |
elliptical galaxy |
| EN |
emission nebula |
| GAL, GLX |
galaxy |
| GC |
globular cluster |
| IC |
Index Catalog |
| IG |
irregular galaxy |
| NEA |
near-Earth asteroid |
| NEO |
nearth-Earth object |
| NGC |
New General Catalog |
| OC |
open cluster |
| PN |
planetary nebula |
| RN |
reflection nebula |
| SG |
spiral galaxy |
| SNR |
supernova remnant |
|
Telescope Abbreviations
| Abbrev |
Meaning |
| Alt-Az |
alt-azimuth mount |
| Apo |
apochromatic refractor telescope |
| CCD |
charge-coupled device |
| Dec |
declination |
| Dob |
Dobsonian telescope |
| DSC |
digital setting circle |
| ED |
extra-low dispersion (glass) |
| EQ |
equatorial mount |
| f |
focal number |
| FOV |
field of view |
| H-alpha, H-A |
Hydrogen Alpha filter |
| HST |
Hubble Space Telescope |
| LP, LPR |
light pollution reduction (filter) |
| Mak |
Maksutov telescope |
| MCT |
Maksutov-Cassegrain telescope |
| MNT |
Maksutov-Newtonian telescope |
| ND |
neutral density (filter) |
| Newt |
Newtonian telescope |
| O-III |
Oxygen-III filter |
| OTA |
optical tube assembly |
| RA |
right ascension |
| SCT |
Schmidt-Cassegrain telescope |
| UHTC |
ultra-high transmission coating |
| UT |
Universal Time |
|
