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Lunar Eclipse FAQ
What is a lunar eclipse?
A lunar eclipse occurs when the Earth passes between the Sun and the Moon, casting Earth’s shadow onto the lunar surface. Unlike solar eclipses, lunar eclipses are visible from anywhere on Earth where the Moon is above the horizon.
What is the difference between total, partial, and penumbral eclipses?
A total lunar eclipse occurs when the entire Moon enters Earth’s umbral (darkest) shadow, often turning the Moon a deep red color. A partial eclipse means only part of the Moon enters the umbra. A penumbral eclipse is subtle — the Moon passes through Earth’s faint outer shadow (penumbra), causing only a slight dimming.
How often do lunar eclipses occur?
On average, there are about 2–3 lunar eclipses per year, though not all are visible from every location. Total lunar eclipses are less common, occurring roughly 2–3 times every 5 years.
Can I see a lunar eclipse from my location?
A lunar eclipse is visible from anywhere the Moon is above the horizon during the eclipse. This page automatically detects your location and shows which upcoming eclipses will be visible to you, including the Moon’s altitude at each phase of the eclipse.