Can you see the Milky Way core in Alaska's national parks?

No. At Alaska's latitudes the center of the Milky Way never climbs more than 2.4 degrees above the horizon, and at 4 of the 8 parks it stays below the horizon altogether. In summer, when the core is in the sky, there's no full darkness. In winter there's plenty of darkness, but the core is below the horizon.

2.4°

Highest the core gets, at Katmai

-6.7°

Lowest, at Gates of the Arctic

8

National park units covered

10°

Height needed to count as visible

Green and pink northern lights above a mountain valley and lake in Alaska
The northern lights above a mountain lake in Alaska.

Denali, Gates of the Arctic, Glacier Bay, Katmai, Kenai Fjords, Kobuk Valley, Lake Clark and Wrangell-St. Elias all sit between 59 and 68 degrees north. The core is in the southern part of the sky, about 29 degrees south of the celestial equator. From a latitude of 58.6 degrees north that puts it just 2.4 degrees up at its highest, and only during the weeks when the Sun is close to it.

Core height and full darkness in Alaska's national parks
ParkLatitude (north)Highest the core getsNights with full darkness in 2027Months with full darkness
Denali National Park & Preserve (opens in a new tab)63.3-2.2°225Aug to Apr
Gates of the Arctic National Park & Preserve (opens in a new tab)67.8-6.7°201Sep to Mar
Glacier Bay National Park & Preserve (opens in a new tab)58.82.3°251Aug to Apr
Katmai National Park & Preserve (opens in a new tab)58.62.4°251Aug to Apr
Kenai Fjords National Park (opens in a new tab)59.81.2°244Aug to Apr
Kobuk Valley National Park (opens in a new tab)67.4-6.3°203Sep to Mar
Lake Clark National Park & Preserve (opens in a new tab)60.60.5°239Aug to Apr
Wrangell-St. Elias National Park & Preserve (opens in a new tab)61.4-0.4°235Aug to Apr

Full darkness means the Sun is more than 18 degrees below the horizon at some point in the night.

What you can see instead

The parts of the Milky Way that are well placed from Alaska are the fainter northern and winter stretches, which run through Cassiopeia, Perseus and Auriga. They're high in the sky on dark autumn, winter and spring nights. Most visitors who come for the night sky in these parks come for the aurora, which has its own forecasts and isn't part of this calculation.

See the parks where the core is visible.

Sources and method

  • Positions of the Sun and galactic center calculated for each park's latitude and longitude, using the same formulas as the other park pages. The core is counted as visible above 10 degrees.
  • Park locations: National Park Service API (opens in a new tab).