Astronomy Links
Department of Physics/Science   Bemidji State University

A wholly incomplete list of interesting and relevant Links with a high level of Astronomy content. If you have suggestions for additional Astronomy Links, contact SFJ.

General Astronomy

Astronomy Net is a central index pointing to many articles and resources.

Bad Astronomy is dedicated to debunking wrong ideas about Astronomy (ranging from merely incorrect ideas through silly ideas on to crackpot ideas) that pervade society in spite of the scientifically established facts.

The Sky This Week is a site about objects of timely interest; It is provided by the US Naval Observatory.

Yahoo! Astronomy Directory has a list of at least 36 categories of well over 3500 astronomy related sites. have free monthly skymaps (both hemispheres) and sky calendars available for download.

Astronomy Picture of the Day is an archive of beautiful images provided by the Goddard Space Flight Center, one of the Centers within NASA. has information and news relevant to the professional, educational, and student Physics and Astronomy communities.

Terrestrial & Space Weather

Clear Sky Clock is a 48 hour forecast of telescopic and naked-eye viewability of the night sky, based on atmospheric conditions near Bemidji State University. It has been generated for us by Attillo Danko at using information from the Canadian Meteorological Centre. The following icon is a thumbnail summary of the present forecast.        

Weather Forecast for Astronomy is the Canadian Meteorological Centre's website for cloud cover and sky transparency forecasts for North America.

Weather Underground is a very useful weather conditions and forecast site for Bemidji, Minnesota.

The Weather Channel is another weather conditions and forecast site for Bemidji, Minnesota.

Unisys Weather is a good, detailed, and technical source of weather forecasts. They offer Meteograms (Hour by hour predictions of temperature, cloud cover, and winds at various ground stations across the continent; They are explained here), Rapid Update Cycle forecast plots for the US for 3, 6, 9, 12 hours into the future, ETA Forecast Model forecast plots for 12, 24, 36, 48 hours in the future, and Medium Range forecast plots for 48 hrs to 10 days into the future.

SpaceWeather has science news and information about the Sun-Earth environment.

Space Weather Now has real-time space weather displays of the solar wind and auroral maps, and many other phenomena. It is sponsored by the Space Environment Center of the National Oceanographic and Atmospheric Administration (NOAA), and is the official source of space weather alerts, warnings, and forecasts.'s solar, aurora, and meteor forecasts.

Space Weather Resources is a compilation of websites relevant to space weather. It is sponsored by Rice University's Rice Space Institute.

Space Weather Today has current views of the sun and the aurora. It is part of the Windows to the Universe project by UCAR, NCAR, and others.

SOHO (Solar and Heliospheric Observatory) is a "stationary" space probe situated at the Lagrangian Point between the Earth and the Sun, perpetually aimed at the Sun. [It is operated jointly by the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA).] Many images and movies of the Sun in recent days and weeks, as well as other resources, are available.

Professional Astronomy

National Aeronautics and Space Administration (NASA) The main homepage, with links to all its scattered facilities and resources.

European Space Agency (ESA) The main homepage, with links to its own resources, such as multimedia shows (a good one is " What the Eye Can See") and orbital tracking information.

AstroWeb: Astronomical Internet Resources is a dynamic Professional Astronomy Resources page, which tries to keep its links current on a daily basis. Some of its subpages are "astronomically" huge in numbers of links.

National Optical Astronomy Observatory (NOAO) The main homepage, with links to its main facilities, the Kitt Peak National Observatory, the Cerro Tololo Inter-American Observatory, the National Solar Observatory, and the NOAO Gemini Science Center, the US gateway to the International Gemini Project (twin 8-meter telescopes in Hawaii and Chile).

National Radio Astronomy Observatory (NRAO) The main homepage, with links to its main facilities, the Green Bank Telescope (GBT) in West Virginia, the VLA and VLBA radio telescope arrays New Mexico, and the ALMA Test Facility in Arizona. Radio telescopes view the universe at wavelengths that correspond to radio frequencies, well below those for optical frequencies.

Space Telescope Science Institute (STScI) The Hubble Space Telescope (and the future James Webb Space Telescope) images and information.

HubbleSite   Everything you'd like to know about the Hubble Space Telescope but were afraid to ask. This site has everything but the kitchen sink (and they may be working on that!).

Chandra X-Ray Center (CXC) The Chandra X-Ray Observatory is a space-borne telescope that views the universe in the wavelengths that correspond to x-rays.

Solar Data Analysis Center (SDAC) typically has maps of solar eclipse tracks in its Eclipse Bulletin, as well as many other data archives from SOHO, Yohkoh and others.

Space Infrared Telescope Facility (SIRTF) was launched last August 25, 2003, and is presently undergoing the initial shakedown tests, scheduled to last about 3 months.

Arecibo Observatory is the world's largest radio telescope, located near Arecibo, Puerto Rico.

Astronomy & Related Societies

American Astronomical Society (AAS) homepage has information for its upcoming conferences and an interesting Astronomy FAQ page.

American Geophysical Union (AGU) is a society of scientists studying phenomena that overlap several of the categories of Geophysics: Earth, Oceans, Atmosphere, Space, and Planets."

Royal Astronomical Society (RAS) is the UK's society for Astronomers and Geophysicists.

The Planetary Society is the "largest space interest group on Earth." Founded in 1980 by Carl Sagan, Bruce Murray, and Carl Friedman to "encourage the exploration of our solar system and the search for extraterrestrial life," it is the founding sponsor of SETI@home.

SETI@Home is a "scientific experiment that uses Internet-connected computers in the Search for Extraterrestrial Intelligence (SETI). You can participate by running a free program that downloads and analyzes radio telescope data." The SETI@Home program uses the BIONC software platform, which is also used by several other worthy scientific projects such as to study climate change, Einstein@home to search for gravitational signals emitted by pulsars, and Predictor@home to investigate protein-related diseases, and others. The SETI@Home program is available from the "Getting Started" part of the SETI@Home home page.

Minnesota Astronomical Society is based in the Twin Cities and services the Metro area and southern Minnesota.

Minnesota Planetarium Society is a new non-profit organization formed to help build and operate a new state-of-the-art Minnesota Planetarium.

Astronomical League The "world's largest federation of amateur astronomers."

Popular Magazines

Astronomy is published monthly.

Sky & Telescope is published monthly.

Scientific American is published monthly.

Discover is published monthly.

Science News is published weekly.

Back to Astronomy Home Page
Back to SFJ Main Page

© 2005 Stevens F. Johnson and Dept. of Physics/Science, Bemidji State University.  All rights are reserved unless explicitly stated otherwise.