Astronomers now believe that the Milky Way is a barred spiral galaxy about 100 000 light-years in diameter. It’s home to nearly 200 billion stars and their planets. The Milky Way has three parts: a disk, in which our solar system resides, a central bulge in the middle, and a spherical halo that surrounds the whole galaxy.

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

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