CARRICK Astronomy Links
C A R R I C K   C O M M U N I C A T I O N  S E R V I C E S
   - S P E C I A L I S T   T R A N S L A T I O N S
   - T E L E C O M U N I C A T I O N S   C O N S U L T A N C Y
   - I N T E R N A T I O N A L   S T A N D A R D A R D I Z A T I O N


Home button  

Standards button

Translations button

Carrick cheap cost effective web design button


On-Line Tools

Hubble Telescope Pictures
Hubble image Hubble image
Hubble image of galaxies
Top 100 images
Hubble - behind the pictures

Solar System

Titan and Saturn  image
Huygens Mission Website

The Moon and Eclipses

Eclipse 1999

More Astronomy Links

Stars and Galaxies

Children and Student Sites

Science and Aviation

    High-five to Courtney and the children she mentors
  • What link would you like here?
  • and here?
  • and here?

Local information

  • Learn to Make a Sundial -for Barb and Brendan
  • Glossary of Astrononomical Terms

    Astronomical Magnitude [m] Indicates the visual brightness of an object. Positive = dim, Negative = bright
    The brightest star (Sirius) reaches 0m, whereas 6m is the limit to the unaided eye. Venus, the brightest planet, reaches -4m. The moon at first quarter is -8m, about the same as the brightest Iridium flares
    Azimuth (degrees) Azimuth defines a point on the horizon in degrees counting from geographic North clockwise to the East.
              (i.e. angular distance around the horizon, where north is 0 degrees, east is 90 degrees.)
    Altitude (degrees) The altitude of a celestial object is its angular distance above the horizon.
    The altitude of an object on the horizon is 0°, and that of an object at the zenith, 90°.
    Right Ascension Right Ascension (abbreviated R.A.) is similar to longitude on the Earth, and is measured in hours of time
    along the celestial equator (divided into 24 equal portions).0 hours is a point on the celestial equator called the vernal or March equinox.
    Declination Declination is measured in degrees, and refers to how far above the imaginary "celestial equator" an object is.
    It is measured as 0 degrees at the equator, +90 degrees at the North Pole, and -90 degrees at the South Pole.
    (Polaris, the North Star, is at (close to) declination +90)
    Great Circle A great circle bisects the celestial sphere into two equal hemispheres
    Celestial Sphere 6th century B.C. Pythagoreans thought the stars as lying on the inside surface of a giant celestial sphere which rotates around us once a day.
    Coordinate Systems Any spherical coordinate system begins with a measurement made along a great circle, with measurements above or below the great circle.
      Three great circles are used as the basis of three different celestial coordinate systems:
         Horizon (altitude and azimuth). Tied to the observer and so do NOT rotate with the Celestial Sphere.
         Celestial Equator (right ascension and declination). Tied to the Celestial Sphere and rotate with it in its diurnal rotation.
         Ecliptic (celestial latitude and celestial longitude)

    Website design by
    Disclaimer: This web-site is for information purposes only, and shall not be construed as an offer. No responsibility or liability whatsoever is accepted with regard to the information on this site or any linked sites, nor for any loss arising from reliance on anything set out on this site. No responsibility is accepted for any information contained in pages prepared for or by a third party or for information contained on linked sites. MORE... HAFTUNGSAUSSCHLUSS