US Southwest wildfires still burning

Across the US Southwest - amid a record-breaking heat wave - fires that started in early June continue to burn.

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.

Moon in front of Cancer on June 26

Crescent moon in front of Cancer the Crab on June 26, 2017. Plus a word about the difference between signs and constellations of the zodiac.

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.

Young moon after sunset June 25

From most places worldwide, except at far-northern latitudes, the moon will set better than hour after sunset on June 25. Look for it near the sunset point.

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.

El Capitan on 1st day of summer

The El Capitan rock formation reflected in a flooded valley in California's Yosemite National Park.

Global coral bleaching event likely ending

Good news for coral reefs at last! After 3 years, the global coral bleaching event is likely over, scientists say.