Why the Sun Disappears for Weeks in Utqiagvik
Utqiagvik, Alaska, sits far north of the Arctic Circle. In winter, Earth’s axis tilts the Northern Hemisphere away from the Sun. As Earth turns each day, Utqiagvik remains on the side of the globe facing away from the Sun, so the Sun’s path stays below the horizon. It does not rise again until late January.
The length of this “polar night” depends on latitude: the farther north a place lies, the longer the Sun can remain below the horizon. Utqiagvik’s roughly 67-day stretch is a seasonal effect of Earth’s tilt, not a change in how long a day lasts everywhere.
Below the Horizon Is Not the Same as Pitch-Black
The Sun’s disappearance does not mean the town is in complete darkness for all 67 days. Around midday, sunlight can still scatter through the atmosphere while the Sun is below the horizon, producing twilight. The amount of natural light changes over the season and with the weather, but the horizon itself remains sunless.
When the Sun finally rises, it marks a gradual turn toward longer daylight. The striking detail is that the return begins with a sunrise at the edge of the horizon—while the surrounding Arctic winter is still very much underway.
