Solar Eclipse Safety for the 21st
We are set for unique experience on Monday, August 21st -- a total coast-to-coast solar eclipse. During that time, the sun will be blocked for two minutes and create eerie diamond rings of light, weather permitting. So, if you are watching on tv or seeing it in person, you should be awed.
If you are planning to view the eclipse in person, here are some safety suggestions:
Make sure you wear eclipse glasses for eye protection. Safe solar viewing is ISO 12312-1.
Experts stress that the only safe way to look directly at the sun, except at the brief phase of totality (in the path of totality), is using a special-purpose solar filter, popularly known as eclipse glasses. Eclipse glasses block more UV rays than everyday sunglasses, protecting your retinas from burning even when you feel no discomfort looking at the sun through shades.
NASA offers the following solar eclipse viewing safety guidelines:
- Always inspect your solar filter before use; if scratched or damaged, discard it. Read and follow any instructions printed on or packaged with the filter.
- Always supervise children using solar filters.
- Stand still and cover your eyes with your eclipse glasses or solar viewer before looking up at the bright sun. After looking at the sun, turn away and remove your filter — do not remove it while looking at the sun.
- Do not look at the uneclipsed or partially eclipsed sun through an unfiltered camera, telescope, binoculars, or other optical device.
- Similarly, do not look at the sun through a camera, a telescope, binoculars, or any other optical device while using your eclipse glasses or hand-held solar viewer — the concentrated solar rays will damage the filter and enter your eye(s), causing serious injury.
- Seek expert advice from an astronomer before using a solar filter with a camera, a telescope, binoculars, or any other optical device. Note that solar filters must be attached to the front of any telescope, binoculars, camera lens, or other optics.
- If you are within the path of totality, remove your solar filter only when the moon completely covers the sun’s bright face and it suddenly gets quite dark. Experience totality, then, as soon as the bright sun begins to reappear, replace your solar viewer to look at the remaining partial phases.
- Outside the path of totality, you must always use a safe solar filter to view the sun directly.
- If you normally wear eyeglasses, keep them on. Put your eclipse glasses on over them, or hold your handheld viewer in front of them.
Be safe as you enjoy the eclipse - the next one is 2024.