NASA jets to chase August 21 solar eclipse

NASA jets to chase August 21 solar eclipse

A cloudy sky will change all our plans for viewing the eclipse August 21, but we still look forward with great anticipation, and hope for clear skies. Divine Savior Healthcare Ophthalmology encourages the community to experience this phenomenon, but also stresses the importance of doing so safely. If not, this is an ungentle second reminder from your erstwhile astronomer not to miss an event that should be on everyone's bucket list [See Sun, Moon, Earth by Tyler Nordgren, "Bookshelf", 11/16].

The eclipse is expected to cross from OR, entering the U.S.at 10:15 a.m. As the Moon completely covers the Sun and perfectly blocks its light during an eclipse, the typically faint corona is easily seen against the dark sky. Regular sunglasses do not protect your eyes.

The only safe way to look directly at the uneclipsed or partially eclipsed sun is through special-purpose solar filters, such as "eclipse glasses" or hand-held solar viewers. "But it's also about the sun and the science of the sun in general, and how eclipses have been used for other types of scientific investigations. The sun can be bright enough to cause retinal damage".

- The total solar eclipse is on August 21. You may notice the effects of the eclipse from about 11:50 a.m. until 2:47 p.m.

The app explains how to make eclipse observations, but you will need to obtain a thermometer to accurately measure air temperature.

But again, the eclipse in Maryland will not be fully total.

"Some of the places they're selling from are reputable manufacturers who we recognize and have had their glasses certified - and others are suspect", says Rick Fienberg, a spokesperson for the American Astronomical Society (AAS), a DC-based nonprofit that's been working with NASA on verifying certified solar filter glasses. HINT: while wearing a pair of undamaged glasses (ones that are not scratched, torn or with holes) you shouldn't be able to see anything except the mild glow of the sun when looking toward the sun. Always use proper filters or safe solar projection techniques. Instead, specially designed eclipse viewing glasses should be procured by viewers. You can contribute observations of the total solar eclipse or partial solar eclipse.

We're now less than four weeks from a total solar eclipse that will be seen by much of the United States, weather permitting.

A total solar eclipse occurs when the moon casts a shadow on Earth, blocking the sun's light in some areas.

This online telescope platform will be showing the total solar eclipse live from Elk Creek Campground in Stanley, Idaho, which is directly in the line of totality. "The general consensus is: 'If solar eclipse glasses are not marked as meeting the ISO standard, you're better off not using them'". The free version has no ads, but if you'd like the app to use your Global Positioning System to help you on eclipse day, you'll need to pay for an upgrade.

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