K
- KAIT – (telescope) Katzman Automatic Imaging Telescope
- KAO – (telescope) Kuiper Airborne Observatory
- KBO – (celestial object) Kuiper Belt Object
- KCAO – (organization) Kumamoto Civil Astronomical Observatory
- KIC – (catalog) Kepler Input Catalog, a catalog of stars with potential extrasolar planets to be observed by the Kepler Mission
- KPNO – (organization) Kitt Peak National Observatory
Read more about this topic: List Of Astronomy Acronyms