Astronomy Magazine an old time favorite to many! Aimed at a lower level than S & T.
Double Star Observer an amateur/professional journal dedicated to double star observing.
Regulus The astronomy newsletter for amateurs of all levels.
Jonathan's Space Report The Space Report ("JSR") is issued about once a week. It describes all space launches, including both piloted missions and automated satellites.
MIT Center for Space Research The Center for Space Research (CSR) at the Massachusetts Institute of Technology supports a broad range of space-related research by scientists in many departments.
NASA's Space Calendar The Space Calendar covers space-related activities and anniversaries for the coming year. This Calendar is compiled and maintained by Ron Baalke, so you know it's good.
SpaceNews Another source of space news from Indiana University.
SpaceWarn The SPACEWARN bulletin is intended to serve as an international communication mechanism for the rapid distribution of
information on satellites and space probes.
Star Times Newsletter good source of amateur stronomy news from the sources on the Internet.
Star Planetarian Journal of the International Planetarian Society. Information on membership, as well as selected articles.
International
The Astronomer A British site with general
news and subscription info. The leading astronomy magazine from the U.K.
Astronomy Now Another British site with general news and subscription info.