The northern lights dance is stunning blue and green hues as they light up the night sky over Oulunsalo, Finland in this captivating night sky photo sent in to SPACE.com.
Photographer Thomas Kast, captured a marvelous photo of the northern lights around 2:15 a.m. local time on Aug. 31. The constellation Ursa Major (Great Bear) can be spotted toward the top right of the photo, just above the bright city lights of Oulo.
The northern lights are auroras triggered by charged particles from the sun (the solar wind) which interact with Earth's upper atmosphere to create a vivid glowing vista such as that seen in this image. These particles are drawn by Earth’s magnetic field to either the North or South Pole, resulting in aurora borealis, or northern lights, and its southern counterpart the aurora australis, or southern lights.