The Northern Lights may be visible again Monday night in parts of the U.S., but not in New Jersey. Pictured here is a view of the dazzling lights seen from Bedminster in Somerset County in early ...

The lights may also appear low on the horizon between 10 p.m. tonight and 10 a.m. tomorrow. The Kp will be at a 5 during both of these periods. What are Kp numbers? The Kp number is a scale that ...