Interesting information

Read on for some fast facts and links on the solar system, constellations and more...


Find out why astronomers rely on measurement units including the light year.
> Space and Beyond

  • Speed of light = 299,792.5km/sec
  • Distance to Sun nearly 150 million km or 8.3 light minutes
  • Distance to nearest star, Alpha Centauri - 4.3 light years
  • Distance to brightest star, Sirius - 8.7 light years

Solar System

Read all about our solar system including the sun, planets, moons, meteors and comets.
> Our solar system

  • Our Sun is a star
  • Planets - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto
  • Ecliptic - path of planets and Sun
  • Moons - At this time there are over 100 natural satellites orbiting the planets in our solar system, more are yet to be discovered


Find out more about the patterns of stars which we call constellations.
> Read more

  • Constellations - only patterns
  • Greek letters - for individual stars

The Ecliptic

Learn more about the imaginary lines used for mapping the sky called the ecliptic.
> Sky mapping 

Astronomy through the ages

Astronomy comes from the Greek word for "the classifying of stars."

Astronomy is one of the oldest sciences - the earth's earliest inhabitants knew something about the sky. They knew the sun gave them light and heat; they learned to measure time by the position of the sun and by the shape of the moon.

Early farmers watched for the change in seasons to know when to plant different crops. For many thousands of years many people believed that the Earth lay at the centre of the cosmos and that the heavens were the home of gods and other mythical creatures.

Today we know that the earth circle's our sun and that we are but one solar sytsem amongst many in one of the many galaxys of our universe. Humankind studies the night's sky with far reaching telescopes and sends probes to the distance edges of our solar system.

Our curiosity of our world and where we belong in it continues to drive our search for knowledge amongst the stars.

All about Astronomy


Follow us on Facebook

Planetarium Facebook

The Adelaide Planetarium has its own Facebook page. 'Like' us to find out about upcoming events, school holiday programs and more. 

Follow us

Mailing list


Calling all astronomy buffs: Join the Adelaide Planetarium mailing list and keep up to date with all the Planetarium events. Best of all, it’s free. 

Join now

Plan your visit


For information about planning your visit to Planetarium. Find out 'what's on' and how to book your session. 

Learn more

Areas of study and research

+ Click to minimise