The year’s brightest comet streaks by Earth this weekend

(CNN) – The night sky will come alive this weekend when a green comet streaks by Earth on the heels of the Geminid meteor shower’s display of green fireballs.
Comet 46P/Wirtanen began brightening in November, but it will make its closest approach to Earth on Sunday and be visible with the naked eye.
The comet will come within 7 million miles of Earth — a proximity that won’t happen again for 20 years. That’s 30 times the moon’s distance from us.
The comet sho