Here are addresses for special topics of interest in astronomy:

Planets

• http://seds.lpl.arizona.edu/nineplanets/nineplanets/intro.html
  lots of good information and pictures
  
• http://stardust.jpl.nasa.gov/planets/index.html
  more good stuff from the people who ran the missions
  
• http://www.seds.org/billa/tnp/other.html
  the sun is not the only star with planets
  hereÕs the evidence for Òextra solar planetsÓ
  
  

  Comets

• http://encke.jpl.nasa.gov
  
• http://medicine.wustl.edu/~kronk/comet.html
  
  

  The Sun

• http://www.hao.ucar.edu:80/public/slides/slides.html
  an excellent tutorial about the sun
  
• http://orpheus.nascom.nasa.gov/synoptic/
  daily pictures of the sun in several different kinds of light
  
• http://umbra.nascom.nasa.gov/images/latest.html
  
  

  Deep Sky Objects

• http://seds.lpl.arizona.edu/messier/Messier.html
  information about and pictures of objects in
  the Messier Catalogue
  
• http://maxwell.sfsu.edu/asp/ngc.html
  more pictures of star clusters, nebulae, galaxies
  
  
  

  Hubble Space Telescope

• http://stsci.edu/top.html
  the home page for the HST
  
• http://www.ast.cam.ac.uk/HST/press.html
  science results from the HST
  
• http://www.stsci.edu/pubinfo/Subject.html
  HST images nicely arranged by subject
  
• http://spacelink.msfc.nasa.gov/Instructional.Materials/Curriculum.Materials/Sciences/Astronomy/Hubble.Space.Telescope/Hubble.Status.Reports
  a long address--but it tells you what the HST is doing
  right now

  Shuttle

• http://shuttle.nasa.gov
  find out all about current and upcoming Shuttle missions