A total solar eclipse will be visible on July 2 for the first time since 2017 - here's who can see it

2017 total solar eclipseFriends from a nearby college watch the eclipse together on Menan Butte August 21, 2017 in Menan, Idaho. Millions of people have flocked to areas of the U.S. that are in the 'path of totality' in order to experience a total solar eclipse.Natalie Behring/Getty

  • The only total solar eclipse of 2019 occurs tomorrow. It will be visible over parts of Chile, Argentina, and the south Pacific Ocean.
  • The celestial event will be more difficult to witness than the 2017 eclipse that was visible in the US, since the path of totality is limited to a narrow strip of land in South America and occurs late in the afternoon.
  • Solar eclipses help scientists study the solar corona: a sheath of hot gases that extends thousands of miles out from the sun's surface.
  • Visit Business Insider's homepage for more stories.

At 4:39 p.m. local time tomorrow, July 2, fish of the south Pacific and some lucky people in southern Chile and Argentina will be plunged into rare afternoon darkness.

It will be the first total solar eclipse since August 21, 2017, and the only only celestial event of its kind in 2019.

During a total solar eclipse, the moon passes between Earth and the sun, casting a small, dark shadow on our planet. For those watching on Earth, the moon appears to cover the sun, with a ring of the sun's light surrounding the moon. Looking directly at that light requires special glasses to protect the eyes from the sun's brightness.

The eclipse's path of totality - in which the sun is fully blocked from view by the moon - is an ample length of 6,000 miles, though most of that is over the Pacific Ocean and a narrow band of Chile and Argentina.

Viewers in South America will experience totality for about 2.5 minutes, roughly the same duration as the 2017 eclipse that crossed the continental US. La Serena, a city on Chile's western coast, will be the first to go dark.

Totality will last the longest over a remote part of the Pacific Ocean west of South America, where the sun will go dark for 4 minutes and 32 seconds. (That point is represented by the black sun in the map below.)

solar eclipse mapProjected path of the 2019 total solar eclipse. The black sun image represents the point of greatest duration during the event, meaning the sun will be wholly eclipsed for 4 minutes and 32 seconds.NASA/Terra Metrics

The late timing for tomorrow's eclipse means that totality occurs will occur about one hour and 18 minutes before sunset, when the sun is low in the sky - just 13 degrees above the horizon.

That could make viewing the event a bit challenging, since low-lying clouds could obscure the spectacle. Researchers will also need to peer through more of Earth's hazy atmosphere to get a clear image of what's happening in the sky.

Totality represents a unique opportunity for scientists who study the sun. It's the only time that the solar corona - the sheath of high-speed, super-hot particles that ensconce the sun - is visible to onlookers.

Occasionally, the corona spits out bursts of scorching hot plasma, which can be between 1.7 million degrees Fahrenheit and more than 17 million degrees - hotter than the surface of the sun itself. These bursts, called coronal mass ejections, can hurl towards Earth at speeds of 1,384 miles per second. Their effects can disrupt our telecommunications infrastructure, knock out power grids, and impact satellites in orbit.

By observing and analyzing the corona's behavior during eclipses, scientists gather information that can help them better understand and predict these coronal mass ejections.

Solar EclipseAnnular Solar Eclipse is observed on May 21, 2012 in Tokyo, Japan.Getty Images/Masashi Hara

The next total solar eclipse will happen less than 18 months after this one. On December 14, 2020 another total eclipse will travel over Chile and Argentina.

The next total solar eclipse that people will be able to see from North America will happen on April 8, 2024.

{{}}
Add Comment()
Comments ()
X
Sort By:
Be the first one to comment.
We have sent you a verification email. This comment will be published once verification is done.