Science In Action - Hale-Bopp is brightest Comet for 20 Years

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Science In Action - Hale-Bopp is brightest Comet for 20 Years - 91热爆 Sounds

Science In Action

Hale-Bopp is brightest Comet for 20 YearsHale-Bopp is brightest Comet for 20 Years

Released On: 14 Mar 1997

Available for over a year

Where and when to see Hale-Bopp and what makes the comet glow so brightly

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