| AAVSO | AstroWeb | AAS | Astro Meetings |
|
ALMA Atacama Large Millimeter Array Science Portal |
Arcetri |
ESO Garching ESO La Silla , Paranal |
HST |
| IAU Home Page | IRAM Granada IRAM 30-m tel. |
IRAM Grenoble IRAM PdB array |
ISO |
| Joint Astronomy Centre JCMT |
KOSMA Univ. of
Cologne KOSMA 3-m tel. |
Leiden Observatory | Medicina VLBI antenna |
| MPIfR
Effelsberg 100-m |
NRAO | TNG-La Palma | SETI |
| STScI | VLA | - | - |