If you're planning to watch, one question matters more than almost any other: how are you going to observe it safely?
Eclipse glasses are the easiest and safest way to view the partial phases. (Image credit: Getty Images)
If you're planning to watch any part of the eclipse with your own eyes, eclipse glasses should be your first purchase. Certified eclipse glasses that comply with the ISO 12312-2 standard block more than 99.999% of sunlight, making it safe to look directly at the sun during the partial phases.
For observers in Britain, Europe and North America outside the path of totality, eclipse glasses are arguably all you need. The entire eclipse remains partial, so the glasses stay on from beginning to end. Even if you're traveling to Iceland, Greenland or Spain for totality, eclipse glasses remain essential throughout the partial phases before and after totality, when the sun is still dangerously bright.
2. Handheld solar viewers for cruise ships
Solar eclipse viewers can be secured using a lanyard. (Image credit: Jamie Carter)Many eclipse chasers prefer handheld solar viewers to eclipse glasses. These use the same safe solar-filter material and are made by the same manufacturers, but provide a larger viewing window. They typically hang around your neck on a lanyard, which makes them essential if you want to observe an eclipse from a cruise ship — it stops them from blowing into the sea. The actual view is almost identical to what you'll see through eclipse glasses.
If you are in the path of totality, you can look at the totally eclipsed sun with the naked eye. (Image credit: Getty Images)
During totality, you MUST take your eclipse glasses off to see the solar corona — one of nature's most extraordinary sights. The naked eye will also help you find bright planets around the eclipsed sun and the horizon glowing with twilight colors in every direction. If this is your first total solar eclipse, make a promise to yourself beforehand: spend at least some of totality doing nothing except looking up.
4. Solar binoculars
Solar binoculars are an easy way to get a close-up of the partial eclipse. (Image credit: Jason Parnell-Brookes)All kinds of magnifications are offered, but 10x42 is about the limit. Any more and they not only become hard to hold steady, but the eclipse then gets more difficult to find in the sky.
Solar filters can be added to any pair of binoculars for viewing the partial phases. (Image credit: Kimberley Lane)
Normal binoculars are arguably a better choice if you plan to be within the path of totality. This is what experienced eclipse watchers do, and with good reason — they simply add solar filters for the partial phases, then remove them during totality for a close-up of the solar corona.
However, since objective lenses come in all shapes and sizes, it's often easier to make your own solar filters using Baader AstroSolar Film. Typically, users will make a solar filter for one lens and cap the other, removing both during totality.
6. Telescopes
Telescopes can be used during the eclipse, as long as they are equipped with a solar filter for the partial phases. (Image credit: Getty Images)The same applies to telescopes as applies to binoculars — you can buy a solar telescope with a permanently attached solar filter, or (a more popular method) put a solar filter on any telescope. However, there is another unusual option here — a dedicated hydrogen-alpha solar telescope, which reveals an entirely different side of the sun.
A smart telescope can take images automatically during the eclipse. (Image credit: Jamie Carter)
Few areas of amateur astronomy have changed as rapidly as smart telescopes. Devices such as the Unistellar Odyssey Pro, ZWO Seestar S30, DwarfLab Dwarf Mini and Celestron Origin have introduced a new generation of observers to astronomy by automating much of the traditional setup and operation.
For eclipse travelers heading to Iceland, Greenland or Spain, smart telescopes can also reduce some of the stress associated with eclipse photography. Many users plan to have the telescope automatically capture the eclipse during the partial phases, then simply enjoy totality with their own eyes. Just don't spend the entire eclipse staring at a smartphone!
8. Livestreams
(Image credit: Time And Date)Confirmed live streams so far include the total solar eclipse by TimeAndDate and the European Space Agency, while partial solar eclipse images will come from the Royal Observatory in Greenwich, London, U.K. When cell signal allows, some eclipse observers keep a livestream running on a nearby phone while observing the real eclipse overhead, and/or livestream views from their own telescope on social media.
What's the best way to look at the eclipse?
The best viewing method for a solar eclipse depends entirely on what you want to get from it. Just remember that the purpose of the technology is to support the experience, not replace it — no instrument can replace the experience of seeing the solar corona with your own eyes if you're within the path of totality. Choose the viewing method that helps you do that — and spend as much time as possible simply looking up.
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