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First solar eclipse of 2022 occurs Saturday. Here's what to expect.

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First solar eclipse of 2022 occurs Saturday. Here's what to expect.
By    Joe Rao    published about 18 hours ago

First solar eclipse of 2022 occurs Saturday. Here's what to expect. 2Q==

The first solar eclipse of 2022 will happen on April 30. (Image credit: Getty)

This year, humans on Earth will experience four eclipses: two of the sun and two of the moon. The first of these is a solar eclipse set to take place on Saturday.  

Interestingly, this partial solar eclipse of April 30 will involve the second of two new moons in the month of April, what colloquially is known as a "Black Moon."

During this upcoming solar eclipse, the dark shadow cone of the moon, from where a total eclipse can be seen, will completely miss the Earth, passing approximately 750 miles (1,200 kilometers) below the South Pole. 

But the moon's outer shadow, or penumbra, will scrape a part of the Southern Hemisphere, resulting in a partial eclipse that will be visible near sunset across a swath of the South Pacific and Southern Oceans, as well as in southern and western portions of South America, including Chile, Argentina, Uruguay, southern Peru southern Bolivia, western Paraguay and a tiny slice of Brazil. 

Related: How to watch the April 2022 solar eclipse online

The greatest eclipse, or the moment when the axis of the moon's shadow cone will be closest to Earth's center, will take place over the Southern Ocean (see green star), 300 miles (480 km) to the northwest of Yelcho Base, a Chilean Antarctic Research Base at South Bay, Doumer Island. 

A ship or trawler near this spot will see the sun will barely clear the west-northwest horizon, with nearly two-thirds of its diameter (63.96%) hidden behind the moon. The normally thick haze on the horizon could attenuate and redden with the sun's light, giving it the appearance of a slice of cantaloupe melon. Unfortunately, no part of this eclipse will be visible from the Northern Hemisphere. 

That said, you can prepare for the next solar eclipses with our guide on how to photograph a solar eclipse safely. Our guides on the best cameras for astrophotography and the best lenses for astrophotography can help you pick the best gear is right for you to catch them on camera.

Solar Eclipse Photography Guide:
—How to photograph a solar eclipse
—Best cameras for astrophotography
—Best lenses for astrophotography
—How to photograph the moon: tips and techniques
Below are viewing circumstances that I calculated, courtesy of Fred Espenak's Eclipsewise.com website — for some selected cities in South America within the viewing zone of the eclipse. Local times apply. 

(Dashes indicate that the sun sets and is not visible. Magnitude is the fraction of the solar diameter covered at maximum. Obscuration is the amount of coverage of the total disk area of the sun.)
Viewing the April 30 solar eclipse









CityEclipse StartsMaximumMagnitudeObscurationSunset
Santiago4:32 p.m.5:36 p.m.0.4129%6:03 p.m.
Ushuala4:46 p.m.5:57 p.m.0.6252%6:08 p.m.
Asunción5:12 p.m.---------5:22 p.m.
La Paz5:38 p.m.6:01 p.m.0.05.01%6:15 p.m.
Buenos Aires5:42 p.m.---------6:12 p.m.
Montevideo5:43 p.m.---------6:03 p.m.

The mechanics of a solar eclipse


First solar eclipse of 2022 occurs Saturday. Here's what to expect. 5514

This NASA animation shows the visibility path of the partial solar eclipse of April 30, 2022 over the southern Pacific Ocean, Antarctica and parts of South America. (Image credit: NASA/A.T. Sinclair)


A solar eclipse can only happen at a new moon phase, when the sun, moon and Earth are positioned in a straight line. However, the moon's orbit is slightly off-kilter relative to the Earth's orbital plane (called the ecliptic) by an amount of just over 5 degrees. This means that, more often than not, when the moon arrives at a new moon phase, it passes either just above or just below the sun; thus, no eclipse can occur. 

The point where the orbital planes of the Earth and moon cross is called a node. If the moon is new when it reaches the nodal crossing point, a solar eclipse will result. If the moon arrives at the node within several hours of a new phase, the sun-moon-Earth alignment will be such that the moon will appear to pass directly in front of the sun, resulting in a "central" solar eclipse.  Depending on the distances of the moon to the Earth and the Earth to the sun, the resulting eclipse will either be total or annular (ring-shaped).         

However, in the case of the upcoming April 30 solar eclipse, the moon will reach a new phase 23 hours and 26 minutes before it reaches the node. That's too far away to allow the moon to pass directly in front of the sun, but still just near enough to allow the moon to, at the very least, cover a part of the sun. 

Be careful...


If you find yourself within a viewing zone of this or any other solar eclipse: DO NOT LOOK DIRECTLY TOWARD THE SUN!

Some safety tips for viewing a solar eclipse:
  • Project the sun's image through a pinhole camera, or through binoculars or a telescope, onto a piece of white cardboard or a similarly colored sheet of paper and view the sun's "shadow" on the paper. 
  • View the sun for short intervals through specially-made "eclipse glasses," but still take caution when doing so. 
  • Look at the sun for short intervals through a No. 13 or No. 14 welder’s glass; this will also appear to turn the sun a shade of green.
  • Do NOT view the sun through smoked glass, crossed polarizing filters or colored water.  They may seem to dim the sun, but the sun’s invisible infrared rays will still get through.
  • Do NOT look through a telescope, even with a specialized filter, unless you really know what you are doing. Any filter that you may use should be placed over the front, NOT behind the eyepiece.



More safety tips can be found here.

https://www.space.com/partial-solar-eclipse-april-2022-what-to-expect?utm_source=SmartBrief&utm_medium=email&utm_campaign=58E4DE65-C57F-4CD3-9A5A-609994E2C5A9&utm_content=5C7941CF-9EE8-4CB5-A55C-F04A407AD9EC&utm_term=e371d2a1-d535-4e10-a6fe-9314088e60d9
Thanks to: https://www.space.com

First solar eclipse of 2022 occurs Saturday. Here's what to expect. Ring_of_fire_solar_eclipse_w570



  

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