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What you need to know about the eclipse

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Monday, July 31, 2017 3:14 PM

This astronomical event will take place on Aug. 21, the first one to cross the U.S. since 1991. NASA estimates 500 million people will be able to see it, in partial or in total form.

Q: What is a total solar eclipse?

A total solar eclipse is when the moon’s orbit completely blocks the sun from Earth’s view, creating a night-like scene. During this brief 2½-minute period, animals have been recorded to begin their nocturnal activities, and temperatures will drop 5 to 10 degrees. Four planets (Mars, Mercury, Jupiter and Venus) will be visible to the naked eye, as well as several bright stars. The eclipse will bring out the sun’s hidden solar corona, the sun’s outermost atmosphere usually hidden by the bright light of the sun, which is considered a breathtaking sight by eclipse travelers.

Q: When is it?

The total solar eclipse will move across the entire United States on Monday, Aug. 21. Lincoln City, Oregon, will be the first city to view the total solar eclipse at 11:15 a.m. MDT. Charleston, South Carolina, will be the last city to experience the total eclipse at 12:48 MDT. The lunar shadow, which is when the moon partially blocks the sun, will occur on the West Coast at 10:05 a.m. MDT, and will end on the East Coast at 2:09 MDT.

Q: Where can I see it?

Viewers will only be able to see a total solar eclipse in a roughly 70-mile path passing through 14 states, beginning in Oregon and ending in South Carolina. Everyone in North America will see a partial eclipse, where the moon partially blocks the sun’s direct light.

Q: What can I see from Cortez?

Cortez will be able to see roughly 80 percent of the eclipse. Residents will be able to see a partial eclipse from 10:18 a.m. to 1:09 p.m., with the peak occurring at 11:41 a.m. Find a nice, clear spot with a good view of the sky.

Q: Can I look directly at the solar eclipse?

Looking directly at the sun is unsafe, except during the total phase of the solar eclipse. Special eclipse glasses should be used, which are generally cheap and widely available. Using ordinary sunglasses, even darker shaded ones, are not safe for viewing an eclipse, especially in Cortez, which won’t see one in totality. Viewing the sun through binoculars, cameras or telescopes is unsafe, even if wearing special eclipse glasses. An alternative method for safe viewing of the partially eclipsed sun is pinhole projection. In this method, you don’t look directly at the sun, but at a projection on a piece of paper or even the ground. For example, cross the outstretched, slightly open fingers of one hand over the outstretched, slightly open fingers of the other. Do not look at your hands, but at the shadow of your hands on the ground. The little spaces between your fingers will project a grid of small images, showing the sun as a crescent during the partial phases of the eclipse.

Q: Can I watch the eclipse online?

A live stream can be seen online at nasa.gov/eclipse. NASA TV will broadcast view of the total solar eclipse live, along with interviews with NASA experts and live feeds from NASA aircraft, balloons and the International Space Station. You can also watch a live stream from high-altitude balloons from research institutions across the country at stream.live/eclipse.

Q: How rare is this event?

Total solar eclipses actually occur every few years, but it’s pretty uncommon to occur in a place near you. NASA estimates that a total solar eclipse that happens where you live occurs every 375 years. The last time a solar eclipse occurred in the contiguous United State was on Feb. 26, 1979, and it won’t happen again until April 8, 2024. The line of totality will cross from Texas, up through the Midwest, almost directly over Indianapolis, Cleveland and Buffalo, New York, up over New England and out over Maine and New Brunswick, Canada. Carbondale, Illinois, will be in the crosshairs once again. There will be a total solar eclipse in 2019, but you’ll have to be below the equator for a glimpse. We’re talking the South Pacific, and Chile and Argentina. It’s pretty much the same in 2020. It’s even rarer for a total solar eclipse to cross the entire North American continent, which hasn’t happened since June 8, 1918. The last time a total solar eclipse took place exclusively in the U.S. was in 1778.

Q: How long does the eclipse take?

The umbra (dark inner shadow) of the moon will be traveling from west to east from almost 3,000 miles per hour (in western Oregon) to 1,500 miles per hour in South Carolina. The total eclipse, when the sun is completely blocked by the moon, will last up to 2 minutes and 40 seconds, depending on location.

Solar eclipse events in and near Durango

Florida Mesa Elementary will host a school-wide eclipse viewing at its campus at 11:20 a.m. on Aug. 21. The school will provide protective eyewear.The Miller Middle School Parent Action Committee purchased eclipse viewing glasses for students and staff, who will watch the solar eclipse at 11:30 a.m. on the school’s football field.Mancos State Park will host a party and offer 100 pairs of eyeglasses to attendees. Meet at the Group Picnic Area starting at 10 a.m. Light refreshments will be served. Mancos State Park is on County Road N at County Road 42. There is a $7 per vehicle park admission charge. Carpooling is encouraged. For more information, call 533-7065 or visit http://bit.ly/2v4N3wh.The Powerhouse Science Center, 1333 Camino del Rio, will host a viewing party from 11 a.m. to 12:30 p.m. The free event will feature four hands-on activities, viewing glasses and lunar temporary tattoos.Anasazi Heritage Center will host Eclipse Extravaganza!, a free viewing party with hands-on activities, solar-viewing equipment and live feeds from the path of totality. Attendees will learn about solar astronomy, sun safety and cultural connections to the sun. The center is at 27501 Colorado Highway 184 in Dolores.Durango Public Library, 1900 East Third Ave., will hold its event from 10 a.m. to noon, and offer eclipse glasses, a variety of solar-eclipse-themed crafts, arts and activities. The event is free and open to all. Viewing glasses are available at the library, and community members are welcome to one pair each.

6 Images

A total solar eclipse will sweep across the United States on Aug. 21, moving from the Northwest to the Southeast. In Cortez, the eclipse will be about 80 percent visible.
This illustration depicts the alignment of the sun, the moon and Earth, which only perfectly occurs about once every 18 months, on average. The umbra and penumbra are shown. Image courtesy of NASA
This image shows the maximum eclipse view people will see at 11:41 a.m. in Durango during the total solar eclipse on Aug. 21. Image courtesy of Timeanddate.com.
Viewing the total solar eclipse without protective eyewear is dangerous. If you don’t have special eclipse glasses, this is an alternative idea. Image courtesy of NASA
The last time a total solar eclipse crossed the entire North American content was in 1918. Courtesy of NASA
The last time a total solar eclipse occurred in the contiguous United States was in 1979. One will occur on Aug. 21 and then not again until 2024. Courtesy of NASA
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