International Year of Astronomy 2009
Galaxies and the Distant Universe
A Universe in Galaxies in Scale
Our Solar System consists of our star, the Sun, and its orbiting planets, along with the numerous moons, asteroids, comet material, rocks, and dust. If we shrink the Sun down to smaller than a grain of sand, we can imagine our Solar System to be small enough to fit onto the palm of your hand. On that scale with our Solar System in your hand, the Milky Way Galaxy, with its 200 billion stars, would span North America.
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