Astronomical Observatories
- Arecibo Observatory
- Cerro Tololo Inter-american Observatory
- European Southern Observatory
- Extreme Ultraviolet Explorer
- Fred Lawrence Whipple Observatory
- Harvard College Observatory
- Hubble Space Telescope
- International Ultraviolet Explorer
- Jodrell Bank Observatory
- Kitt Peak National Observatory
- Lick Observatory
- Lowell Observatory
- Mauna Kea Observatories
- Mcdonald Observatory
- Mount Hopkins Observatory
- Mount Stromlo Observatory
- Mount Wilson Observatory
- Nuffield Radio Astronomy Laboratories
- Observatory, Orbiting
- Orbiting Astronomical Observatory
- Orbiting Geophysical Observatory
- Orbiting Solar Observatory
- Pulkovo
- Siding Spring Observatory
- Yerkes Observatory