A unique astronomical alignment will occur on March 3rd, offering observers a rare opportunity to witness what was once considered impossible: a total lunar eclipse happening at the same time as sunrise. This phenomenon, known as a selenelion (or selenehelion ), results from the unusual visibility of both the eclipsed moon and the rising sun in the sky concurrently.
Visibility Across Regions
The best views of the total eclipse phase will be available near the Pacific Rim. For North America, the timing varies: Eastern Time Zones will see the moon set during early dawn; locations further west may catch the moon emerging from Earth’s shadow as it dips below the horizon. Hawaiians will have an optimal view, with the moon high overhead during totality. Meanwhile, Central Asia and western Australia will see the moon rise as it exits the Earth’s shadow. Eastern Australia, Papua New Guinea, Japan, and eastern Siberia will also enjoy convenient evening viewing conditions.
The moon will enter the Earth’s shadow at 3:03 a.m. PST, with the total phase lasting 59 minutes. For certain regions, this will create an unusual effect—the simultaneous presence of the eclipsed moon and the rising sun, a sight that defies simple geometric expectations.
Why This Happens: Atmospheric Refraction
The seeming impossibility of a selenelion stems from the traditional understanding of lunar eclipses. When the sun, Earth, and moon align in a straight line, with Earth in the middle, the sun and moon should be 180 degrees apart in the sky. However, atmospheric refraction bends light, making astronomical objects appear higher than they are.
This means the sun appears to rise slightly before it actually does, and the same applies to the moon setting. This atmospheric “trick” creates a brief window—roughly 1 to 3 minutes—where the rising sun and the eclipsed moon can be seen at the same time in specific locations.
Regional Variations and Best Viewing Spots
For areas west of the Continental Divide, this effect may not be visible. The moon will likely emerge from the Earth’s shadow before setting in most Mountain and Pacific Time Zones. The Central Time Zone will see the moon emerging from the Earth’s umbra (darkest shadow). Eastern Time Zone observers will likely witness the moon setting fully eclipsed, while Atlantic Canada may only see the opening partial stages.
To maximize visibility, ensure unobstructed eastern and western horizons. Clear skies are crucial, as brightening twilight and atmospheric haze can obscure the view within 10–15 minutes before sunrise. The eclipsed moon will resemble a dim, eerily lit sphere during this time.
“The simultaneous presence of a lunar eclipse and sunrise is a remarkable event that demonstrates the subtle but powerful effects of atmospheric refraction on our perception of the cosmos.”
The March 3rd eclipse offers a unique chance to witness this rare alignment, reminding us that even seemingly impossible phenomena can occur in the natural world.
