Posted on 03/01/2017 10:24:23 AM PST by Red Badger
On Aug. 21, 2017, American skywatchers will be treated to a rare and spectacular celestial show — the first total solar eclipse visible from the continental United States in nearly four decades.
Next year's "Great American Total Solar Eclipse" will darken skies all the way from Oregon to South Carolina, along a stretch of land about 70 miles (113 kilometers) wide. People who descend upon this "path of totality" for the big event are in for an unforgettable experience, said eclipse expert Jay Pasachoff, an astronomer at Williams College in Massachusetts.
"It's a tremendous opportunity," Pasachoff told Space.com. "It's a chance to see the universe change around you." [Solar Eclipses: An Observer's Guide (Infographic)]
A total solar eclipse last darkened soil on the U.S. mainland on Feb. 26, 1979. But August 2017 will mark the first time in 99 years that such an event is "readily available to people from coast to coast," Pasachoff said.
A rare event
The fact that total solar eclipses occur at all is a quirk of cosmic geometry. The moon orbits an average of 239,000 miles (384,600 kilometers) from Earth — just the right distance to seem the same size in the sky as the much-larger sun.
But most solar eclipses are of the partial variety, in which the moon appears to take a bite out of the sun's disk. Indeed, two to five solar eclipses occur every year on average; total eclipses happen just once every 18 months or so. (Eclipses are relatively rare because the moon's orbit is inclined about 5 degrees relative to that of Earth. If the two bodies orbited in exactly the same plane, a solar eclipse would occur every month, during the moon's "new" phase.)
Furthermore, the narrow path of totality is often inaccessible to skywatchers — most of Earth is covered by water, after all — so a total solar eclipse that occurs over populated areas is quite special. Indeed, the August 2017 event will be the first one whose totality path lies completely within the United States since 1776, experts have said.
That path goes from the Oregon coast through Idaho, Wyoming, Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, Georgia, North Carolina and South Carolina. While just 12 million people or so live within the narrow band, perhaps 220 million reside within a day's drive of it, according to Space.com skywatching columnist Joe Rao. [Incredible Solar Eclipse View Shot During Alaska Airlines Flight (Video)]
Pasachoff advises folks to make that drive when the time comes.
"Though the rest of the continental U.S. will have at least a 55 percent partial eclipse, it won’t ever get dark there, and eye-protection filters would have to be used at all times even to know that the eclipse is happening. The dramatic effects occur only for those in the path of totality," Pasachoff said in a statement.
"If you are in that path of totality, you are seeing the main event, but if you are off to the side — even where the sun is 99 percent covered by the moon — it is like going up to the ticket booth of a baseball or football stadium but not going inside," he added.
Pasachoff himself plans to be there. He has observed 63 solar eclipses to date, and not just for fun: The events provide a rare opportunity to study the sun's wispy outer atmosphere, which is called the corona. (The sun's overwhelming brightness usually drowns out the faint corona.)
Temperatures in the corona top 1.8 million degrees Fahrenheit (1 million degrees Celsius), making the region much hotter than the solar surface, which is just 11,000 degrees F (6,000 degrees C) or so. How the corona gets so hot has puzzled scientists for decades, and Pasachoff and his colleagues aim to gather some useful data during the Great American Eclipse.
"How energy is injected into the corona is one of the things we'll be investigating," Pasachoff told Space.com.
Be safe!
If you do plan to observe the August 2017 eclipse, remember: NEVER look directly at the sun without proper eye protection, except when the solar disk is completely occluded (during the brief period of totality); serious and permanent eye damage can result.
"Proper eye protection" includes specially made solar filters, eclipse glasses or No. 14 welder's glass. You can also observe the eclipse indirectly, by making a pinhole camera or watching shadows cast by trees. (The gaps between leaves act as natural pinholes.)
To learn more about how to safely observe the sun, check out this Space.com infographic.
Finally, if you miss out on the August 2017 event, don't despair — you'll get another chance seven years later. In 2024, a total solar eclipse will darken the skies above Mexico and Texas, up through the Midwest and northeastern U.S.
[SNIP]
Editor's note: If you take an amazing photo of the 2017 solar eclipse or any other celestial sight you'd like to share with us and our news partners for a possible story or image gallery, send images and comments in to managing editor Tariq Malik at spacephotos@space.com.
Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @Spacedotcom, Facebook or Google+. Originally published on Space.com. Editor's Recommendations
The center of the eclipse will be right over where I live at 10:15 AM. It’s usually not cloudy in August here, but you never know. Damn shame if it is. I already missed one total solar eclipse because of clouds.
Already have tickets and reservations to Boise and plan to drive north into the totality zone. Just ordered solar filters for the binocs.
Had a friend who went to Mexico for a total eclipse back in the 80’s and when he got to where it was it was rainy.................
It’s like God’s playing a joke or something.
I’ll be on my sail boat at an undisclosed lake, with thousands of firearms at the bottom, right in the path. Should be fun.
Well, after Halley’s Comet fizzled back in 1986, this is probably the last great astronomical event of my life...............
You didn’t see Hale-Bopp? It was impossible to miss. That was once in a lifetime.
“I’ll be on my sail boat at an undisclosed lake, with thousands of firearms at the bottom, right in the path. Should be fun.”
I hope you have your SCUBA gear with you. With PRESIDENT Trump there are gong to be lots of underwater metal recovery operations going on.
It was just a fuzzy ball from where I was................
Traveled to Hawaii to visit my mom and see the eclipse. Spent the night on Mt Kilauea. Woke to partly cloudy skies only to have complete, thick cloud cover for the eclipse itself. It did get dark and I did see the moon’s shadow race from Maui towards me, but missed the main. I now live in the path of totality (S.E. Missouri) and am looking forward to it.
Thanks for that- my post though was tongue in cheek- as no maN knows the ‘day or hour’ of Christ’s return-
is that a real site?
Yeah, there was some thrill seeing the shadow approach and the birds freaking out as it suddenly got dark, but I’d like to see it without cloud cover this time. Fingers crossed.
There was an eclipse in the early 80’s. I remember it got dark enough for the street lights to come on. Dogs were freaking out.
Silly scientist -- You inject the energy into the lime, then you insert the lime into the Corona. What are they teaching in colleges nowadays? That's basic Beer Drinking 101 material.
True enough.But I'd be bringing my camera.
Made my hotel reservation last November.
GSMNP? Clingmans Dome?
A 20 minute ride to totality from here.
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