Astronomical  Links
Observation and astronomical images
  • Hubble Space Telescope's photos
  • Messier objects
  • Observation of  artificial satellites
  •   The constelations
    • Fundamental Astronomy
  • A basic course in  astronomy
  • Spherical trigonometry
  • Celestial coordinates
  • Another one of celestial coordinates
  • One more of celestial coordinates
  • Finder of terrestrial  coordinates
  • Systems of time in astronomy
  • Julian date calculator
  • Universal Time Coordinated, now!
  • Local Times in cities of the world, now!
  • Astronomic catalogs
  • "Simbad" finder of astronomic bodies
  • "VizieR" finder of astronomic bodies
  • Interactive astronomic dictionary
  • A lot of astronomic links
  • Some basic calculations for space flight
  • Some useful constants
  • Earth rotation service
  • International Celestial  Reference System
  • Earth orientation (polar motion)
  • Earth rotation
  • Past, present and future eclipses
    •  
    Celestial mechanics
  • Bureau des longitudes Ephemerides generator
  • JPL Ephemerides generator
  • Altitude and azimuth  for Sun and Moon
  • Astrodinamics group of the University  of Viena
  • Links in celestial mechanics
  • Basics of celestial mechanics
  • A nice course in celestial mechanics
  • The two-body problem
  • World's largest optical telescopes
  • Recommendation for your first telescope
  •  Atomic spectra database
  • Photometry and radiometry
  • The solar system
  • A lot of information about the  solar system
  • The space weather (solar wind and auroras)
  • Comets currently visibles
  • Bright comets
  • Minor planets (near asteroids, centaurs, plutins, etc.)
  • Moon crater nomenclature
    •  
    Astronautics
  • Enciclopedy of artificial  satellites
  •   What is an artificial satellite?
  • Bulletins on satellite's launches
  •   Everything on space shuttle
  • Astronautics news
  • Space exploration
  • USA manned missions history
  • Basic concepts on space flight
  •   Spot artificial satellites from Bogotá (Colombia)
    •  
    Cosmology
  •   General relativity course
  • Cosmology course
  • Finger information for extragalactic objects

  • The sound of pulsars
  • Latest supernovae
  • Basic course on cosmology and astrophysics (in spanish)
  • Atomic emission lines
  • Updated emisssion lines (CHIANTI)
  • Excelent course on astrophysics
  • Spectroscopy and  CCD
  • A basic course on astrophysics
  • Open clusters  server
  • Obtain the spectrum of any object from SDSS



    •         Active Galactic Nuclei
  • Professional journals in astronomy
  • Server of journals from NASA
  • Pre-prints in astrophysics
  • LaTeX manual on line
  • Cool course in LaTeX
  • Fundamental instructions in IDL
  • IDL astronomy User's library



    •             Others






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