Frequently used sites

LIBRARIES

Astro-ph archive

NASA Astrophysics Data System

Interactive GUIDE for ATOMDB

Physical Review Online Archive

The Astrophysical Journal

OBSERVATORIES

XMM-Newton Science Operations Centre

SCIENCE IN THE NET

Scientific.ru

Astronet

Astronomy Picture of the Day

Independent University of Moscow

Astro-Physical Calculator

Fundamental Physical Constants from NIST

Personal Pages

SAI FTP