The aurora borealis reaches up to the Milky Way over the 20 Mile River in Chugach National Forest, Southcentral Alaska.

The aurora borealis towers over the Talkeetna Mountains in Hatcher Pass State Recreation Area, Alaska.

The aurora borealis towers over the Talkeetna Mountains in Hatcher Pass State Recreation Area, Alaska.

Aurora borealis over Potter Marsh in the Anchorage Coastal Wildlife Refuge, Alaska

Scenic view of the aurora borealis over the frozen Knik River, Southcentral Alaska

The aurora borealis above the Turnagain Arm south of Girdwood, Alaska.

Panoramic view of the aurora borealis over the frozen Knik River with Pioneer Peak in the background.

Northern Lights in the sky above Moose Pass, silhouetted Kenai Mountains and trees in the foreground, Chugach National Forest; Alaska, United States of America

Green northern lights over the Copper River and Wrangell Mountains near Glennallen, Southcentral Alaska, USA, Winter

Clouds clearing over Seward Highway from the Kenai Mountains above Turnagain Pass after a winter snow storm, fresh snow in the trees, early morning sun, Turnagain Pass, Chugach National Forest, Southcentral Alaska, USA.

Northern Lights in the sky above Moose Pass, with silhouetted Kenai Mountains in the foreground, Chugach National Forest; Moose Pass, Alaska, United States of America

Green northern lights over the Copper River and Wrangell Mountains near Glennallen, Southcentral Alaska, USA, Winter

Star trails and northern lights over the Copper River and Wrangell Mountains near Glennallen, Southcentral Alaska, USA, Winter

Northern Lights in the sky above Moose Pass, with silhouetted Kenai Mountains in the fog and low cloud, Chugach National Forest; Moose Pass, Alaska, United States of America

Northern Lights in the sky above Moose Pass, with silhouetted Kenai Mountains in the fog and low cloud, Chugach National Forest; Moose Pass, Alaska, United States of America

Green Aurora Borealis dances over the Kenai Mountains, Moose Pass, Kenai Peninsula, South-central Alaska; Alaska, United States of America

Northern Lights in the sky above Moose Pass, with silhouetted Kenai Mountains in the fog and low cloud, Chugach National Forest; Moose Pass, Alaska, United States of America

Northern Lights in the sky above Moose Pass, with silhouetted Kenai Mountains in the fog and low cloud, Chugach National Forest; Moose Pass, Alaska, United States of America

Northern Lights in the sky above Moose Pass, silhouetted Kenai Mountains in the foreground with fog and low cloud, Chugach National Forest; Alaska, United States of America

The aurora borealis fills the sky over the Chugach and Kenai Mountains, Southcentral Alaska