International Year of Astronomy (2009)
Astronomy picture of the day
ADS - The NASA Astrophysics Data System
astro-ph - The Astrophysics Preprint Server
AAS - Online Directory / Meetings
Jobs: AAS Job Registry, Berkeley Job Rumor Mill, Original Rumor Mill,
HigherEdJobs.com Astro, Physics Today Astro,ChronicleCareers
International Astronomy Meetings List
UMass Talks: Colloquium, Extragalactic Lunch, Astronomy Lunch
Journals: AJ, ApJ, MNRAS, Physics Today, dictionary.com

Lists of Catagorized Sites

Astronomy & Physics Departments
Observatories & Research Telescopes
Innovative Astronomy & Science Education Resources
Observing
Data Reduction, Analysis, and Computing
Astrophysical Simulations
Useful Numbers, Concepts, and Compendia
Surveys
Misc. Databases and Catalogs
Clusters of Galaxies
Images: Clusters, Groups, Merging and Interacting Galaxies
AstroLink Lists