Most of Montana will see a partial solar eclipse, where sun obscuration will be greater than 80%, and more than 90% in parts of southern Montana.
As the moon passes between the earth and the sun, the sun's shadow will cast down on the earth's surface. You should NOT be able to see it. The eclipse will start around 12:57 p.m., peak at 2:25 p.m. and move on at around 3:45 p.m.
The American Astronomical Society has a list of companies that either make eclipse viewers that have been specifically reviewed by the AAS, and retailers who only sell genuine glasses. "So unless you are going to be a hundred years older than you are now and make it to a total solar eclipse, I suggest you get out there". The last partial eclipse in IN was in 2014, and the next total eclipse will pass over the Hoosier state in April 2024. Carmel Clay Public Library said it passed out over 1,000 solar viewing glasses within a one-hour period, and Butler University's Holcomb Observatory ordered extra shipments to meet last minute demands.
If the sun isn't out when you want to test your glasses, you can use a bright-white LED such as the flashlight on your phone or a bare light bulb.
A bad pair of glasses won't offer any protection for your eyes.
One way to tell if your glasses are not safe, the AAS recommends, is by looking through it.
The safety standards for eclipse viewing glasses are set by the International Organization for Standardization, or the ISO. You can look through them safely, but not if they're counterfeit. "The infrared radiation can literally cook your retina".
"If that comes pouring into your eye, you won't even know that it's cooking your retina because your retina doesn't have pain receptors" Fienberg added. Your other sheet, right in the middle, just take a pen, or whatever you may have, to make a really small hole, kind of about that size right there.
NASA says taking images of the eclipsed sun ought to be done with safety in mind.
Singleton said making a pinhole camera is what many people will need to do, since the museum ran out of glasses.