NOAA Space Environment Center -- The official U.S. government bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances. http://www.sec.noaa.gov/

Atmospheric Optics -- the first place to look for information about sundogs, pillars, rainbows and related phenomena. See also Snow Crystals. http://www.sundog.clara.co.uk/atoptics/phenom.htm

Solar and Heliospheric Observatory -- Realtime and archival images of the Sun from SOHO. (European Mirror Site) http://sohowww.nascom.nasa.gov/

Daily Sunspot Summaries -- from the NOAA Space Environment Center.

Current Solar Images --a gallery of up-to-date solar pictures from the National Solar Data Analysis Center at the Goddard Space Flight Center. See also the GOES-12 Solar X-ray Imager. http://umbra.nascom.nasa.gov/images/latest.html

Recent Solar Events -- a nice summary of current solar conditions from lmsal.com. http://www.lmsal.com/solarsoft/latest_events/

SOHO Farside Images of the Sun from SWAN and MDI. http://sohowww.nascom.nasa.gov/data/summary/swan/swan-images.html http://soi.stanford.edu/data/farside/index.html

The Latest SOHO Coronagraph Images -- from the Naval Research Lab http://ares.nrl.navy.mil/realtime.html

The Sun from Earth -- daily images of our star from the Big Bear Solar Observatory http://www.bbso.njit.edu/cgi-bin/LatestImages

List of Potentially Hazardous Asteroids -- from the Harvard Minor Planet Center. http://cfa-www.harvard.edu/iau/lists/Dangerous.html

Observable Comets -- from the Harvard Minor Planet Center. http://cfa-www.harvard.edu/iau/Ephemerides/Comets/

What is the Interplanetary Magnetic Field? -- A lucid answer from the University of Michigan. See also the Anatomy of Earth's Magnetosphere. http://www.windows.ucar.edu/cgi-bin/tour_def/glossary/IMF.html

Real-time Solar Wind Data -- from NASA's ACE spacecraft. How powerful are solar wind gusts? Read this story from Science@NASA. http://www.sec.noaa.gov/ace/ACErtsw_home.html

More Real-time Solar Wind Data -- from the Solar and Heliospheric Observatory Proton Monitor. http://umtof.umd.edu/pm/

Mirages: Mirages in Finland; An Introduction to Mirages; http://virtual.finland.fi/netcomm/news/showarticle.asp?intNWSAID=25722

http://volcano.und.edu/

http://volcanoes.usgs.gov/ (cut and paste this one)

http://volcano.und.edu/vwdocs/current_volcs/current.html

http://www.earthnewswire.com/

http://www.sciencedaily.com/news/earth_summaries.php

http://www.windows.ucar.edu/spaceweather/

http://chandra.harvard.edu/

http://www.spitzer.caltech.edu/

http://space.physorg.com/http://news.independent.co.uk/environment/

http://www.earthchangestv.com/index.php

http://hubblesite.org/

http://www.livescience.com/ check out Bigfoot ;~)

http://www.newscientistspace.com/article.ns?id=dn8582

http://www.telescope.org/