Enjoying EarthSky? Subscribe.

231,785 subscribers and counting ...

Deanna Conners
Wayne Boyd shared his photo of the ISS passing over Marstons Mills, Massachusetts on November 4, 2016.  Thanks Wayne!

How to spot ISS in your sky

A new map-based feature in NASA’s Spot the Station program makes it even easier to track the International Space Station as it passes over you.

A 1585 map of Iceland created by Abraham Ortelius. Image via Wikimedia Commons.

Mount Hekla was called Gateway to Hell

Mount Hekla is Iceland’s 3rd most active volcano. A large eruption in 1104 earned it the moniker Gateway to Hell. Is Mount Hekla overdue for another eruption?

Photo via Daniel de Leeuw Photography

Why trees shed their leaves in the fall

Something to think about while raking.

Donnehue's Cave in Indiana. Image Credit: Sam Frushour.

Clues to ancient earthquakes in caves

Stalagmites on the floors of caves in southern Indiana contain evidence of past earthquakes, scientists say.

Photo via Manish Mamtani Photography

Why Earth has 4 seasons

Some assume our planet’s changing distance from the sun causes the change in the seasons. That’s logical, but not the case, for Earth.

Kit Delauriers describes her self as a ski mountaineer. Image via The North Face.

Tallest peak in the US Arctic is …

No one knew whether Mount Chamberlin or Mount Isto was taller. Now an aerial study – and a ski mountaineer – declare a winner.

Image via Hawai'i Volcanoes National Park

More than 450 volcanoes in Ring of Fire

The Pacific’s Ring of Fire has 75% of the world’s active and dormant volcanoes, plus it’s prone to powerful earthquakes. Here’s why.

deep-sea-crustacean-800

Man-made chemicals in deepest sea

Scientists have detected persistent man-made chemicals in crustaceans from the Mariana Trench and Kermadec Trench, deepest parts of the ocean ever sampled.

Image via Juan Ramon Rodriguez Sosa/Flickr.

How fireworks get their colors

The colors in fireworks help create “ohhhhs” and “ahhhhs.” But what creates the colors?

Flowering Tree (Sirdavidia solannona). Image Credit: Thomas Couvreur.

Top 10 new species of 2016

From a giant tortoise to a tiny beetle and an early hominid, this year’s top 10 new species list contains some exciting finds.