SKY · FIELD GUIDE
How to Watch a Solar Eclipse — Safely
There's a solar eclipse coming, and you want to see it. But you've heard you can damage your eyes — so how do you actually watch one safely, and what will it look like from where you live? Here's everything a first-timer needs, without the jargon.
A solar eclipse is the most dramatic thing the sky ever does — daylight draining away, the Sun reduced to a sliver or a ring or, if you're lucky enough to be in the right place, vanishing entirely behind the Moon. It's also the one sky event where you genuinely need to know the safety rules before you look up. The good news: they're simple.
The one rule that matters
Never look at the partial Sun without proper protection. Not through sunglasses, not through a phone camera, not squinting "just for a second." The Sun is so bright that it can burn your retina painlessly and permanently, and most of an eclipse is partial. The only moment it's safe to look directly is during totality — the brief minute or two when the Moon completely covers the Sun — and only if you're inside the narrow path where totality happens.
For everything else, you need certified solar-eclipse glasses (look for the ISO 12312-2 standard) or an indirect method. A pinhole projector is the easiest: poke a small hole in card, let sunlight pass through onto a second surface, and watch a tiny crescent Sun appear. A kitchen colander projects dozens of them at once. You're always looking at the projected image, never up at the Sun itself.
The three kinds of eclipse
What you see depends on the geometry of that particular eclipse and where you're standing.
Total — the Moon exactly covers the Sun, revealing the pearly corona streaming out around a black disc. The sky darkens to twilight, stars come out, the temperature drops. This is the legendary experience, and the only time you can lower your glasses. It lasts a minute or two.
Annular — the Moon is a little too far from Earth to cover the Sun completely, so a brilliant "ring of fire" remains around its edge. Spectacular, but never safe to view unfiltered — there's always blinding Sun showing.
Partial — the Moon takes a bite out of the Sun but never covers it. This is what the vast majority of people see, because it's visible across a huge region on either side of the narrow central path. A deep partial is still a remarkable thing to watch safely through your glasses.
Why location is everything
The Moon's shadow traces a narrow band — the path of totality, usually a couple of hundred kilometres wide — across the Earth. Stand inside it and you get the full show. Stand a few hundred kilometres away and you get a partial. Stand on the wrong side of the planet and you see nothing at all.
That's exactly what your city's eclipse page answers: which upcoming eclipses actually reach you, what you'd see from there (totality, a partial, or a near-miss worth travelling for), the local date and time of day, and even whether the Sun is above your horizon when it happens. Pair it with a clear-sky check for the day, get your glasses ready, and you'll be set to watch the sky put on its greatest performance — safely.
Frequently asked questions
Is it safe to look at a solar eclipse?
Not directly — except during the brief total phase, when the Moon completely covers the Sun. At every other moment, including the entire partial and annular phases, looking at the Sun without proper protection can permanently damage your eyes, and it can happen painlessly. You must use certified solar-eclipse glasses (ISO 12312-2) or an indirect method like a pinhole projector. Ordinary sunglasses, however dark, are not safe.
What's the difference between a total, annular and partial eclipse?
It depends on how perfectly the Moon lines up with the Sun and how far away the Moon is. In a TOTAL eclipse the Moon completely covers the Sun for a minute or two, revealing the corona — the only time it's safe to look directly. In an ANNULAR eclipse the Moon is slightly too far from Earth to cover the Sun fully, leaving a brilliant 'ring of fire' around its edge (never safe to view unfiltered). A PARTIAL eclipse is what everyone outside the narrow central path sees: the Moon takes a bite out of the Sun but never fully covers it.
Will I see totality from where I live?
Only if you're inside the narrow path of totality — a band usually a couple of hundred kilometres wide that the Moon's shadow traces across the Earth. Everyone for thousands of kilometres on either side sees a partial eclipse instead. That's why location is everything: your city's eclipse page tells you which upcoming eclipses reach you, and whether you'd see totality, a partial, or need to travel for the full experience.
What can I use if I don't have eclipse glasses?
The simplest safe method is a pinhole projector: poke a small hole in a piece of card and let the sunlight pass through it onto a second surface — you'll see a tiny image of the eclipsed Sun. A colander or any object with small holes does the same thing, projecting dozens of little crescents. You're looking at the projected image on the ground, never up at the Sun. Welding glass of shade 14 or higher also works, but ordinary sunglasses, smoked glass and exposed film do not.
How long does an eclipse last?
The whole event — from the first bite out of the Sun to the last — typically runs two to three hours. But totality itself, the dramatic part where the Sun vanishes, lasts only a minute or two (occasionally up to about seven). The 'ring of fire' of an annular eclipse can last several minutes. The partial phases on either side are slow and gradual, which is why you need protection for the long stretch and can only relax your eyes during the brief total phase.
When is the next solar eclipse I can see?
That depends entirely on where you are. Solar eclipses happen somewhere on Earth roughly every six months, but each is visible only from a specific slice of the planet. Open your city's eclipse page to see the upcoming eclipses that actually reach you, the local date and time of day, and how much of the Sun will be covered from your location.
SEE IT LIVE
Everything in this guide is on the live sky map.