Data:
- Astro-ph
- NASA Astrophysics Data System
- SIMBAD Astronomical Database
- ESO DSS
Institutions, observatories:
- Konkoly Observatory
- SZTE Observatory
News
- APOD
- MCSE news
- Space flight Now
- Universe Today
- Astronomy Now
- SpaceWeather
- Sky and Telescope
- Astronomy
- Space News
Telescopes:
- Gemini Bt.
- Makszutov
- BTC
- Telescope Service