Galaxies are the largest single structures in nature, and certainly among the most beautiful. These vast, starry islands have slowly been sculpted over billions of years by the force of gravity. It’s believed that there are about 100 billion galaxies in the universe, and that most of them have a black hole at their centre.

Canadian Heritage Information Network
Australian Museums & Galleries Online, Australia; Centre of the Universe; Gemini Observatory, Hawaii; Glenbow Museum; The Manitoba Museum; National Research Council Canada; Planétarium de Montréal

© Canadian Heritage Information Network, 2003

Teachers' Centre Home Page | Find Learning Resources & Lesson Plans