How to Safely Observe Next Week's Partial Solar Eclipse

Partial Solar Eclipse as Seen in Juneau, AK, on Oct. 23, 2014

The greatest extent of the eclipse in the United States will be visible from Juneau, Alaska, at 1:31 p.m. AKDT, 61 percent of the sun covered. (Image credit: Starry Night software)

Millions of people across North America could have a chance to observe a partial solar eclipse next week, weather permitting.

Although Thursday's (Oct. 23) partial solar eclipse may not be as spectacular as a total eclipse, it is still a beautiful and interesting event to witness. The sight of the moon gradually moving across the face of the sun fills most people with awe.

The best views of the eclipse will be in the north, in Alaska and the Canadian arctic, but everyone in North America should see some of it, except in the extreme northeast of the continent. In eastern North America, the eclipse will only be visible near or at sunset, so a low western horizon is essential. Venus is very close to the eclipsed sun, but you will probably need to block the sun from view to spot it. [Find out how to see the partial solar eclipse using these sky maps]

In some ways a partial eclipse is the most dangerous to observe. People naturally want to look at it, and this defeats our normal reflex to look away from the sun. WARNING: Never look directly at the sun through binoculars, a telescope or with your unaided eye. Serious eye damage and even blindness can result. Scientists and experienced skywatchers use special filters and glasses to safely observe the sun.

52 percent of the sun will be covered in Minneapolis, Minnesota, at 5:35 p.m. CDT. (Image credit: Starry Night software)

The safest way to view a solar eclipse is by using a pinhole in a piece of cardboard to project the sun. This is particularly effective with an eclipse near sunset, like this one. Punch a hole a couple of millimeters in diameter in the middle of a piece of cardboard, and tape it against a west-facing window. This will project a perfect image of the eclipsed sun on a wall opposite.

Do not use binoculars or telescope to view the sun unless you have a properly designed solar filter, such as the full aperture solar filters available for all telescopes at any store selling astronomical gear. Do not improvise with home-brew solutions, as permanent eye damage is likely to occur.

Editor's Note: If you take an amazing skywatching photo of the partial solar eclipse or any other celestial site that you'd like to share for a possible story or image gallery, please contact managing editor Tariq Malik at spacephotos@space.com.

This article was provided to Space.com by Simulation Curriculum, the leader in space science curriculum solutions and the makers of Starry Night and SkySafari. Follow Starry Night on Twitter @StarryNightEdu. Follow us @Spacedotcom, Facebook and Google+. Original article on Space.com.

Geoff Gaherty was Space.com's Night Sky columnist and in partnership with Starry Night software and a dedicated amateur astronomer who sought to share the wonders of the night sky with the world. Based in Canada, Geoff studied mathematics and physics at McGill University and earned a Ph.D. in anthropology from the University of Toronto, all while pursuing a passion for the night sky and serving as an astronomy communicator. He credited a partial solar eclipse observed in 1946 (at age 5) and his 1957 sighting of the Comet Arend-Roland as a teenager for sparking his interest in amateur astronomy. In 2008, Geoff won the Chant Medal from the Royal Astronomical Society of Canada, an award given to a Canadian amateur astronomer in recognition of their lifetime achievements. Sadly, Geoff passed away July 7, 2016 due to complications from a kidney transplant, but his legacy continues at Starry Night.