A comet that has delighted backyard astronomers in recent weeks after an unexpected eruption has now grown larger than the sun.
The sun remains by far the most massive object in the solar system, with an extended influence of particles that reaches all the planets. But the comparatively tiny Comet Holmes has released so much gas and dust that its extended atmosphere, or coma, is larger than the diameter of the sun.
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It's a pretty amazing sight. Last week, you could easily see it with the naked eye.