A shadow-band project for August 21

Shadow bands are elusive ripples of alternate light and dark, flitting over the ground or the sides of buildings during a total solar eclipse. How to take part in an International Shadow Band Campaign during the August 21 eclipse.

Jupiter at east quadrature July 6

It's a hallmark in Jupiter's appearance in our sky. At eastern quadrature, Jupiter is highest in the sky around 6 p.m. local time

Solar eclipse safe viewing tips

If you're planning to watch the August 21 total solar eclipse (and we hope you are!) take a minute to watch this video on how to watch safely.

How much traffic on eclipse day?

Expert analysis showing how many people - and how much traffic congestion - can be expected along the path of the August 21, 2017 total solar eclipse.

NASA’s plans for August 21 eclipse

Not traveling to the centerline of the eclipse? Expect NASA images via 11 spacecraft, at least 3 aircraft, more than 50 high-altitude balloons, and the International Space Station.

Saturday night’s extremely young moon

Photo and animation of an extremely young moon - only 18 hours past the new phase - setting over a hill last night, as seen from Rio de Janeiro, Brazil.

The eclipse is just 2 lunations away

As we approach another new moon, astronomer Guy Ottewell shares his profound understanding of lunar cycles and the coming total solar eclipse.

What’s a conjunction?

When two heavenly bodies seem to come together: EarthSky community member Tom Wildoner explains the term "conjunction" in astronomy.

What’s it like to see a total solar eclipse?

Words often fail when trying to explain the kaleidoscope of sights, sounds, feelings and emotions that consume us during this other-worldly event.

Fav photos: 2017’s smallest full moon

EarthSky friends outdid themselves this weekend, taking photos of the full moon. Thanks to all who contributed!

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