On August 21, 2017, all of North America will be treated to solar eclipse with the path of totality, where the sun is totally covered by the moon. On the map below, you can find where exactly can be a total eclipse of the sun visible.
If you would like to see the solar eclipse on your own eyes, here are some methods how you can observe it safely. Methods are sorted from cheapest to most expensive.
Make your own pinhole projector
A pinhole projector is one of many ways to view the partial phases of a solar eclipse indirectly, meaning that spectators can still see the eclipse without looking at the sun. You will need only two sheets of paper and a pin or thumbtack.
- Poke the hole in one paper with pin
- Place the second piece of paper on the ground and hold the piece of paper with the hole in such a way that its shadow is cast onto the ground.
- In the center of the shadow, there should be a circle of light made by the hole in the paper.
Use a solar eclipse glasses
You can buy a solar eclipse glasses. There is a lot of models and brands, you can buy it on the internet (Eg. here) or in your local store for few dollars.
Use welder’s glass
You can also use welder’s glass with shade number 14 (or higher).
Telescopes and cameras with Solar Filters
You can also use your camera or telescope, but you must have mounted special sun filter.
If you don’t have such a filter, you can buy it for example here
- NASA and the AAS recommend that solar-viewing or eclipse glasses meet the current international standard: ISO 12312-2. Some older solar-viewing glasses may meet previous standards for eye protection, but not the new international standard.
- If the filters are scratched, punctured, or torn, do not use it!
- Never look at the Sun directly without protective eye gear.
- Do not look at the uneclipsed or partially eclipsed Sun through an unfiltered camera, telescope, binoculars, or other optical devices.
- Do not use sunglasses, smoked glass, polarizing filters, or exposed color film. These methods are not safe!