The northern lights are about to return to the night sky over Canada and part of the United States, one of the best opportunities to see the aurora in weeks.

An eruption on the sun over the weekend blasted charged particles into space, and they are on a collision course with Earth. When the charged particles reach the planet, it will set off a colorful display of the Aurora Borealis.

People as far south as Pennsylvania, Missouri, Colorado and Oregon could see the green or red glow of the aurora in the sky on Monday night. Photographers using long-exposure photography may be able to capture images of the lights from areas even farther south.

NOAA's Space Weather Prediction Center has issued a geomagnetic storm watch from Monday into Tuesday, with conditions likely to reach a level 3 out of 5.

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