SUN · FIELD GUIDE
Total, Annular, Partial: The Types of Solar Eclipse Explained
Why is one eclipse a jaw-dropping black Sun with a halo, and another just a bright ring? It comes down to a cosmic coincidence — and a few thousand kilometres.
Every solar eclipse is the Moon passing between Earth and the Sun. But what you see depends on a delicate piece of cosmic luck — and on exactly where you're standing.
The coincidence that makes it possible
The Sun is about 400 times wider than the Moon — and also about 400 times farther away. By sheer chance, that makes them look almost exactly the same size in our sky. No other planet has a moon that fits its star so neatly. It's why Earth gets the most spectacular eclipses in the solar system.
But the Moon's orbit isn't a perfect circle. Its distance from Earth varies by about 13%, and that small difference is what splits eclipses into types.
Total eclipse
When the new Moon happens while it's closer to Earth, it appears slightly larger than the Sun and blots it out completely. For a few seconds to a few minutes, day turns to an eerie twilight, the brightest stars and planets appear, and the Sun's ghostly outer atmosphere — the corona — blazes into view. This is the only time it's safe to look with the naked eye, and the only kind of eclipse where that magical totality moment exists.
Totality is visible only along a narrow path of totality, often just 100–200 km wide.
Annular eclipse ("ring of fire")
When the new Moon is farther from Earth, it appears slightly smaller than the Sun and can't quite cover it. At maximum, a brilliant ring of sunlight — the "ring of fire" — surrounds the black Moon. It's beautiful, but because a blinding sliver of Sun is exposed the entire time, there is no safe naked-eye moment — filters stay on throughout.
Partial eclipse
A partial eclipse is the Moon taking a "bite" out of the Sun, leaving a crescent. This is what everyone outside the central path sees during a total or annular eclipse — and some eclipses are partial everywhere, because the Moon's central shadow misses Earth and only its fuzzy outer shadow lands. Always requires eye protection.
Hybrid eclipse
The rarest type. Because Earth is curved, the Moon-to-observer distance changes along the track, so a single eclipse can be total in some places and annular in others. Only a handful occur each century.
Why not every month?
A logical question: the Moon passes the Sun every month at new Moon, so why isn't there a monthly eclipse? Because the Moon's orbit is tilted about 5° relative to Earth's path around the Sun. Most months the Moon's shadow sails harmlessly above or below us. Only when a new Moon lines up near the two crossing points of the orbits does the shadow actually strike Earth — which is why eclipses arrive in twice-yearly seasons rather than monthly.
Which one is coming to you?
Each entry on the eclipses tracker is tagged with its type, and every country page tells you whether the central path — totality or annularity — actually crosses your country, or whether you'll see a partial. That distinction decides everything about what the day will look like from where you live.
Frequently asked questions
What's the difference between a total and an annular eclipse?
Both happen when the Moon passes directly in front of the Sun. In a total eclipse the Moon is close enough to appear slightly larger than the Sun, so it covers it completely and reveals the corona. In an annular eclipse the Moon is farther away and looks slightly smaller, leaving a bright 'ring of fire' around its edge. It comes down to the Moon's varying distance from Earth.
What is a partial solar eclipse?
A partial eclipse is when the Moon covers only part of the Sun's disk, leaving a crescent. Everyone outside the narrow central path of a total or annular eclipse sees a partial; some eclipses are partial everywhere they're visible because the central shadow misses Earth entirely.
What is a hybrid eclipse?
A rare type that shifts between total and annular along its path because Earth's curvature changes the Moon-to-observer distance. Some locations see totality while others, further along the track, see a ring of fire.
Why isn't there a solar eclipse every month?
Because the Moon's orbit is tilted about 5° to Earth's orbit, so at most new Moons the Moon's shadow passes above or below Earth. Only when a new Moon happens near the points where the two orbits cross does the shadow actually fall on Earth — which is why eclipses come in seasons, not monthly.
SEE IT LIVE
Everything in this guide is on the live Sun tracker.