Seeing a total solar eclipse and the Northern Lights in one go is possible but not very likely. The lights start appearing in mid-August as nights get darker and days become shorter. During the eclipse, the sky might be dark enough for a faint glow of the Auroras, but don't expect a full display. Their visibility depends on solar activity and the strength of solar winds. To maximize your chances, it's best to book separate tours for the Northern Lights and the Eclipse.