Astronomy Cafe http://www.theastronomycafe.net

Educational and professional resources; descriptive articles, hot keys to data archives, software; Ask the Astronomer window for submitting questions; presented by professional astronomer Dr. Sten Odenwald; full-text articles on fun topics as well as serious topics.

Astronomy Calculator http://members.nuvox.net/~zt.rback/

Shows and calculates dates for expected astronomical events, including:  phases of the moon; lunar eclipse in all phases; meteor showers with related information; viewing information for planets; glossary; links to other astronomy sites.

Astronomy Magazine http://www.astronomy.com/content/static/magazine/default.asp

Geared toward backyard astronomers; provides previews of current and upcoming issues; highlights sky events; links to other astronomy sites; some full-text articles included on current events in astronomy.

Astronomy Unbound http://www.herts.ac.uk/astro_ub/

Subtitled:  "A Virtual Astronomy Text," from University of Hertfordshire, UK; provides introductory exploration of astronomy with diagrams, photos, and related links; tables for units of measurements, acronyms, timeline, and more; designed for advanced high school or undergraduate college students.

Bad Astronomy http://www.badastronomy.com

Examples of mistakes in the media, movies, and on TV; searchable; used as the method to explain actual science; authored by astronomer at NASA's Goddard Space Flight Center.

The Center for Archaeoastronomy http://www.wam.umd.edu/~tlaloc/archastro/

Defines archaeoastronomy (study of astronomical practices, celestial lore, mythologies, religions, and world-views of all ancient cultures"); annotated set of related links, organized by subject, to general, Native American/Meso-American, Megalithic, and world Archaeoastronomy sites; provided by professionals at University of Maryland.

Chandra X-Ray Observatory Center http://chandra.harvard.edu/pub.html

Search site devoted to new X-ray space observatory launched summer 1999; Field Guide includes information on X-ray astronomy and cosmic X-ray sources; glossary, handouts, illustrations, links, and more.

Constellations and Their Stars http://www.astro.wisc.edu/~dolan/constellations/

Explains what constellations are; lists stars and constellations alphabetically, by month, and by catalog number; includes interactive star charts; bibliography of star myths by culture with brief explanations behind the names of constellations; authored by graduate student in astronomy at University of Wisconsin.

Expanding Universe:  A Classified Search Tool for Amateur Astronomy http://vrl.tpl.toronto.on.ca/expanding_universe/

Large listing of sites arranged by subjects through a series of menus and submenus; designed for amateur astronomers; searchable; designed by Toronto Reference Library.

From Stargazers to Starships http://www-spof.gsfc.nasa.gov/stargaze/Sintro.htm

Tutorial focused on three topics:  astronomy of the earth's motion in space (including experiments and projects on the calendar, seasons, Kepler's laws, building a sundial, etc.); Newtonian mechanics (Newton's laws, discussion of mass and motion); spaceflight and spacecraft (including principles of the rocket, Goddard's early rockets, future space propulsion); timeline and glossary.

NASA http://www.nasa.gov/

National Aeronautics and Space Administration; comprehensive in coverage with links to all NASA sites, includes Astronomy Picture of the Day with detailed explanations from NASA astronomers; hyperlinked to other pictures, explanations, etc.   See also NASA Image Exchange (NIX) , which is designed for simultaneously searching one or more of NASA's online image and photo collections; keyword searching; images, textual descriptions, image numbers, links to higher resolution images, more information; Browse link leads to NASA's choice of their best photos.

National Space Science Data Center http://nssdc.gsfc.nasa.gov/

Searchable site for data from NASA's space flight missions; photogallery of planets, stars, spacecraft, comets, etc.; General Public Page leads to a chronology of lunar and planetary exploration and fact sheets on each planet.

Origins:  Galaxies, Stars, Planets, . . . and Life http://eis.jpl.nasa.gov/origins/

Information on NASA's Origins Program on planets, solar systems, and life outside our solar system; Education Outreach section includes research opportunities, online tutorials, series of simplified explanations of project's objectives; related links, technical reports, papers, speeches, presentations.

Peoria [Illinois] Astronomical Society http://www.astronomical.org

Includes information on how stars are named; alignment when viewing the sky; recording data; methods that measure time in astronomy; pronunciation guide;

lengthy article on black holes plus beginning and intermediate articles about observing objects in space; star maps and data on constellations; facts and images for planets; large list of related links; information provided by amateurs as well as professionals.

Sky and Telescope Interactive Sky Charthttp://skyandtelescope.com/observing/skychart/

Naked-eye views of the sky from any location on earth, at any time of day or night, on any date from 1600 to 2400; also gives latitude and longitude of the selected location, sunrise and sunset, moonrise and set.

Space Telescope Science Institute http://www.stsci.edu/

Site for Hubble Space Telescope; includes history, news releases, photographs and movies, educational activities, archive of collected data, directory of resources for research astronomer.

StarDate Online http://stardate.org/

Excellent educational astronomical site; includes Night Sky stargazing tips; Sky Almanac of lunar phases, planet positions, etc.; Telescope Guide for first-time buyers; annual events such as eclipses and meteor showers; full-text of StarDate radio show (current and archived); glossary; FAQ file; Solar System Guide, and more; University of Texas McDonald Observatory.

Stephen Hawking's Universe http://www.wnet.org/archive/hawking/html/home.html

Based on PBS program; explains cosmological concepts in simple, easy-to-understand language (e.g., black holes, antimatter, super strings, dark matter); Cosmological Stars features individuals who have made significant contributions in cosmology; Universe provides various theories of the universe and its beginnings and end; ideas that are still problematic to scientists; related links.

Views of the Solar System http://www.solarviews.com/eng/homepage.htm

Extremely informative site with recent images from space as well as index to these images; extensive coverage of each planet, the sun, meteors, and comets; section on impact craters and volcanoes on earth; history of space exploration; glossary; tables of historical, orbital, and physical data.

Virtual Trips to Black Holes and Neutron Stars http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html

Computer animated "movies" that are scientifically accurate; published paper from American Journal of Physics, geared for college students.  See also Black Holes and Beyond and Black Holes FAQ for more information on these phenomena.

Universe Today http://www.universetoday.com

Provides overviews, rather than in-depth articles, with links to sites where one can locate more detail; breaking news, obscure topics, and other relevant information is covered.

Your Sky http://www.fourmilab.to/yoursky/

Interactive planetarium of the Web with three ways to view the sky with links to descriptive information; offers Sky Maps, Horizon Views, and a Virtual Telescope;  author John Walker provides no scientific credentials.

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