![]() In addition to being a generally good eye-safety tip, keeping your filters on until totality means that there’s no risk of being dazzled by the sun and missing what happens next. It’s also safer because there’s no risk that you’ll take your filters off too soon,” says Fienberg. “That makes it easier to deal with your solar filters. Now, you might be wondering how best to capture all this on camera.įienberg suggests watching for Baily’s beads before the moon covers the sun, and the diamond ring after, when the moon is uncovering the sun. Photographing Baily’s beads and the diamond ring Instead of being this arc of sunlight, it was this ring of beads that looked like a necklace!”īaily himself explained his experience to the Royal Astronomical Society as follows: But in this 1836 eclipse, something unusual happened.Īs usual, “the moon never completely covered the sun,” says Fienberg, but this time, “the matching size happened to be so close that he saw these beads of light almost all the way around. Annular eclipses, unlike total eclipses, take place when the moon is further from the Earth, and therefore unable to completely block the sun. Is it covered with stand-alone peaks, or a mountain range? Are the mountains steep or gently-sloped? These factors can determine how sharp and distinct the beads look.įrancis Baily, an English astronomer, first popularized the notion during the annular eclipse of 1836. It’ll look as if it’s set on top of the inner solar corona, the sun’s white-hot crown of plasma.Īnd the experience is different from year to year-it all depends on the terrain at the moon’s leading edge. And as the moon continues to move, you’re eventually left with one last bead, the diamond. So as the moon moves between us and the sun, the mountaintops will break the sliver of blazing sunshine into a string of dazzling beads. But “all the real action is in the last minutes before the moon completely covers the sun, and in the first minutes when it begins to uncover the sun.”īaily’s beads and the diamond ring both happen because the lunar mountains are the first part of the moon to completely slide across the sun’s face. Of course, the whole eclipse will be a “dramatic and truly awesome experience,” says Rick Fienberg of the American Astronomical Society. ![]() The light show will last for less than a minute, so you’re going to want to keep your eyes on the (disappearing) ball. The last surviving bead, set atop a ring made of the sun’s corona, forms the so-called diamond. If you’re planning on joining in the merriment, look out for Baily’s Beads and the diamond ring effect-the last rays of sunshine before and after totality, when it all goes black.īaily’s beads look like a string of blinding gems around the edge of the moon. And during a total solar eclipse, you can actually see the sunlight cutting a path through that lunar terrain.Īs you may already know, a broad swath of the United States will turn into a giant total solar eclipse party on August 21. The Moon isn’t just some big round rock: it has mountains and valleys. ![]()
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