Archivi
e Banche Dati per Astronomia nei Raggi X
OAPA
Pwdetect Code V1.0 per Chandra
Archivio
Meteorologico Storico
Astronomi e Istituti Astronomici
The Astrophysics
Data System (ADS) Abstract Service
provides easy access to currently about 160,000
Astronomy and Astrophysics abstracts. There is also a European
mirror.