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.

A dazzling display in the nighttime sky might be seen much farther south than usual, including parts of Iowa, Oregon and Pennsylvania, by Tuesday, forecasters said.

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.