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EarthSky Voices

Mystery light shines near Cygnus A core

When astronomers aimed the Very Large Array at the well-studied galaxy Cygnus A, they were surprised to find a bright new object near the galaxy’s core. Supernova explosion, or a second supermassive black hole?

Denmark’s never-ending May twilights

Happening now in Denmark: “bright nights,” when the sun is never far below the horizon. Photographer and videographer Adrien Mauduit tells the story and provides stunning imagery.

Astronomers find waves in Io’s lava lake

New data on the massive molten lake on Jupiter’s moon Io – most volcanically active world in our solar system – suggest 2 lava waves per day, slowly sweeping west to east.

Imaging modern brains to study Stone Age thinking

We can’t observe brain activity of extinct human species. But we can observe modern brains doing things that our distant ancestors did for clues to how their brains worked.

Asteroid 2014 JO25: What we learned

This article from NASA’s Center for Near-Earth Object Studies provides fresh details on the closest approach by a large asteroid since 2004 … and shows you how science works.

Why cats can’t resist (even a phony) box

Twitter has been blowing up with posts on cats’ attraction to taped squares on the ground. An animal behavior expert explains what draws Fluffy to the #CatSquare.

Molecular clocks track human evolution

How do scientists figure out when evolutionary events happened? It turns out our DNA is a kind of molecular clock, keeping time via genetic changes.

Super halos around very young galaxies

Astronomers directly observed a pair of Milky-Way-like galaxies, seen when the universe was 8% of its current age. They were excited to find the young galaxies surrounded by huge halos.

Bodies freed from gravity’s grip

Life on Earth is used to gravity. So what happens to our cells and tissues in space?

Real-life Hoth is disappearing

Hardangerjøkulen, the Norwegian ice cap better known to Star Wars fans as the ice planet Hoth, is melting and may disappear by 2100.