Diamond Ring, Baily's Beads & the Corona
In the final seconds before the Sun disappears completely, the sky puts on a sequence of effects so vivid and fast-moving that first-timers often gasp aloud. From Baily's beads to the diamond ring to the pearly corona, each happens in quick succession — and knowing what to look for means you won't miss a thing. Here is the full sequence, in order, with the safety notes that matter most.
The minutes before: an eerie approach
Well before the Sun disappears, the world starts to feel wrong in a wonderful way. The light turns steely and cold, shadows sharpen strangely, and the temperature drops noticeably. Look at a pale surface — a white card or a footpath — and you may see shadow bands: faint, rippling stripes caused by atmospheric turbulence bending the last thin sliver of sunlight. Keep your ISO 12312-2 eclipse glasses on through all of this; the Sun is still dangerous.
Baily's Beads: sunlight through the Moon's valleys
As the Moon's edge slides across the final sliver of Sun, the lunar mountains and valleys break that crescent into a chain of brilliant points of light called Baily's beads. They are real sunlight pouring through the gaps between the peaks on the Moon's limb. The beads flicker and shrink over a few seconds — still with your eclipse glasses on — until only one blazing point remains.
The diamond ring: your cue to take the glasses off
That last bead, blazing beside the first glimpse of the faint corona, is the diamond ring: a single brilliant spot on a glowing ring of light. It lasts only a second or two. The moment it winks out and the Sun is completely covered — and only then — it is safe to remove your eclipse glasses and look with your naked eyes. If you are not certain totality has fully begun, keep the glasses on a moment longer.
Totality: the corona, prominences, and a changed sky
With the Sun's face hidden, its outer atmosphere — the corona — appears around the black disc of the Moon as a pearly-white halo of streamers and plumes. At the edge of the Moon you may also spot pink prominences or a thin arc of the reddish chromosphere. The sky darkens enough for bright planets and stars to emerge, and the horizon glows all the way around in a 360-degree sunset. Take it all in — totality rarely lasts more than a few minutes.
The second diamond ring: glasses back on immediately
Totality ends exactly as it began. A new diamond ring blazes on the opposite side of the Moon — the first point of direct sunlight returning. This is your signal: eclipse glasses go straight back on the instant you see it, without hesitation. Baily's beads will reappear briefly, and then the partial phases resume, and the Sun must again be viewed only through certified ISO 12312-2 filters until the eclipse is completely over.
Common questions
When exactly is it safe to take my eclipse glasses off?
Only when the Sun is completely covered during totality and you are inside the path of totality. The diamond ring marks the transition — wait for it to vanish, confirming the Sun is fully hidden, then remove your glasses. The moment you see the diamond ring return at the end of totality, put them straight back on.
Will I definitely see Baily's beads and the diamond ring?
Almost certainly, yes. Baily's beads appear whenever the Moon's edge crosses the Sun's, and the diamond ring follows from the last bead. They happen fast — a matter of seconds — so knowing to watch for them at the very edge of the Moon just before and just after totality means you won't be caught off-guard.
What does the corona actually look like?
It looks like a soft, white halo of light surrounding the black disc of the Moon — structured with streaks and plumes rather than a uniform glow. It is far fainter than the Sun itself, which is why it's only visible when the Sun's face is completely covered. You may also see pink prominences flickering at the Moon's edge if conditions are good.