Comet vs Asteroid

Which cosmic wanderer is the greater spectacle?

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Comets are dirty snowballs of ice and dust from the outer solar system; as they near the Sun they grow glowing tails that can stretch tens of millions of kilometres. Asteroids are the rocky, metal-rich leftovers of planet formation, most orbiting in the belt between Mars and Jupiter. One dazzles the night sky, the other once helped wipe out the dinosaurs.

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