A solar eclipse gives you a rare chance to watch the moon slide across the sun, notice strange shifts in light and animal behavior, and, if you’re in the path of totality, see the sun’s corona with your own eyes. Making the most of it comes down to protecting your vision, knowing what to watch for on the ground around you, and being ready for the few minutes when everything changes at once.
Protect Your Eyes First
Looking at the sun during any partial phase of an eclipse will damage your retinas, and you won’t feel pain while it’s happening. Symptoms of solar retinopathy, the injury caused by staring at the sun, typically show up within hours to two days. They include blurred vision, a blind spot near the center of your visual field, distorted shapes, altered color perception, and headaches. The damage can be permanent.
Safe solar viewers must meet the ISO 12312-2 international standard, which limits the amount of visible light, ultraviolet, and infrared radiation that passes through the filter. Compliant glasses reduce sunlight to the equivalent of a shade 12 to shade 15 welding filter. If your glasses meet this standard, you can look at the partially eclipsed sun for as long as you want without risk.
The catch is that counterfeit glasses are common, and there’s no reliable home test to verify whether a pair actually blocks UV and infrared radiation. The American Astronomical Society maintains a list of reputable vendors. If you’re not sure where your glasses came from, don’t trust them. A genuinely safe filter will make everything around you completely dark; the only thing visible through it should be the sun itself, appearing as a sharp, comfortable disc.
Build a Pinhole Projector in Minutes
If you don’t have certified glasses, a pinhole projector lets you watch the eclipse indirectly using materials you already have at home. You need two pieces of white card stock, a small square of aluminum foil, tape, and something sharp like a pin or paper clip.
- Cut a hole: Cut a 1- to 2-inch square out of the center of one piece of card stock.
- Cover it with foil: Tape aluminum foil over that hole.
- Poke a pinhole: Use a pin or paper clip to make a single small hole in the foil.
- Project the image: Place the second piece of card stock on the ground. Hold the foil card above it with the foil side facing up, standing so the sun is behind you. A small image of the eclipsed sun will appear on the card below.
The farther apart you hold the two cards, the larger the projected image. You can also poke multiple holes in the foil to create a grid of tiny sun images, each one showing the moon’s bite taken out of the disc. Even the gaps between tree leaves act as natural pinhole projectors, casting crescent-shaped light spots on the ground during a partial eclipse. Look down at sidewalks and shaded areas for this effect.
What to Watch for on the Ground
Some of the most memorable parts of an eclipse happen around you, not above you. In the seconds just before and after totality, thin ripples of light and shadow race across flat surfaces on the ground. These are called shadow bands, and they look like shimmering, wavy lines moving quickly across pavement, walls, or a white sheet laid out for the purpose. They last only a few seconds, so lay something light-colored and flat on the ground ahead of time if you want to catch them.
The temperature can drop noticeably as the sun disappears. If you’re outside during totality, you’ll likely feel a sudden coolness, similar to how the air changes at sunset but compressed into minutes. Bring a light jacket even on a warm day.
Animals react to the sudden darkness as if evening has arrived. During documented eclipses, zoo researchers observed gorillas, elephants, and a Komodo dragon moving toward their nighttime shelters. Diurnal birds returned to their evening roosts. A nocturnal bird, the tawny frogmouth, did the opposite and became active. Some animals displayed signs of apparent anxiety, most notably giraffes, flamingos, and baboons. If you’re near pets, livestock, or wildlife, pay attention. Dogs may whine or seek shelter, birds may go quiet, and crickets may begin chirping.
How Colors Shift During Totality
One of the strangest parts of a total eclipse is what happens to the colors around you. In normal daylight, your eyes rely on cone cells in the retina that are sensitive to red, green, and blue wavelengths. As the sun disappears and light drops to twilight levels, your eyes enter a transitional mode where both cones and rod cells work together. Red cones lose their signal first, which means reds and oranges go dark and muted while greens, blues, and purples appear strikingly vivid.
People who witnessed the 2017 total eclipse described green meadows turning lavender. The peak sensitivity of rod cells corresponds to a wavelength that looks like cyan, the color of tropical ocean water. That’s the color that stands out most during totality. This shift, known as the Purkinje effect, reverses as soon as the sun reappears, so the whole transition plays out twice in just a few minutes. It’s worth pulling your eyes away from the sky for a moment to notice the landscape.
When You Can Look Without Glasses
During a total solar eclipse, there is one brief window when it’s safe to look at the sun with no filter: totality itself, the period when the moon completely covers the sun’s bright face. This lasts anywhere from a few seconds to a few minutes depending on your location. You’ll know totality has arrived when the last sliver of sunlight vanishes and the sun’s corona, a wispy white halo, becomes visible against a darkened sky.
The moment any bright sunlight reappears at the edge of the moon, you must look away or put your glasses back on immediately. During a partial eclipse, where the moon never fully covers the sun, there is no safe moment to look without certified filters. This distinction matters: only people inside the narrow path of totality ever get a bare-eye viewing window.
Photographing the Eclipse With a Phone
Your smartphone camera needs the same protection your eyes do. During partial phases, place a certified solar filter over the phone’s lens. Do not substitute ordinary sunglasses, polarizing filters, or standard neutral-density filters. They don’t block enough UV and infrared radiation to protect the camera sensor, and pointing your phone at the sun without a filter can degrade the image or damage the sensor.
During totality, remove the filter to capture the corona. A few settings tips make a real difference. Tap and hold on the sun’s edge to lock autofocus, then slide your finger up or down to adjust exposure manually. Avoid digital zoom, which just crops and degrades the image. Hold the phone as steady as possible or brace it against something solid. If you’re shooting through a telescope eyepiece, get the lens as close to the eyepiece as you can to reduce glare.
That said, the most common regret people report after their first total eclipse is spending too much time looking at a screen. Totality is short. Consider taking a few quick photos, then putting the phone down and just watching.
Make the Most of the Experience
Arrive early and get settled. Eclipses draw large crowds, and traffic near the path of totality can be severe. Bring a white sheet or posterboard to watch for shadow bands and crescent projections. Have your glasses within arm’s reach so you can put them on and take them off quickly as totality begins and ends.
Use your senses beyond sight. Listen for birds going quiet and insects starting up. Feel the temperature drop. Notice the 360-degree sunset glow along the horizon that appears during totality, a pale orange band visible in every direction because the edge of the moon’s shadow doesn’t reach all the way to the horizon.
If you’re watching a partial eclipse rather than a total one, the experience is quieter but still worth your attention. The pinhole projections through tree leaves are easy to spot once you know to look, and the gradual dimming of light takes on an eerie quality that’s distinct from clouds or sunset. With proper glasses, you can track the moon’s progress across the sun’s disc over the course of an hour or more.