A moon for the 3rd-largest dwarf planet

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So many moons! With the discovery of a moon for 2007 OR10, most known dwarf planets in the Kuiper Belt - larger than 600 miles across - now are known to have companions.

Deborah Byrd

May 19, 2017

Milky Way over Ijen Volcano

Since National Geographic ran a story on the electric-blue flame of Ijen Volcano, tourism has increased. Seeing the night sky is another reason to go!

Deborah Byrd

May 19, 2017

A giant magnetic bridge between galaxies

Known as the Magellanic Bridge, it's a huge stream of neutral gas stretching 75,000 light-years between the 2 Magellanic Clouds, which orbit our Milky Way.

Deborah Byrd

May 18, 2017

Humans and pufferfish share teeth genes

Our teeth evolved from the same genes that make the bizarre beaked teeth of the pufferfish, according to new research.

Eleanor Imster

May 18, 2017

Alligator’s bellow communicates size

For an alligator, in both love and war, it’s good to be big . An alligator’s bellow communicates just how big it is.

Eleanor Imster

May 18, 2017

There’s always one out there

Sometimes, in night photography, a little light is a good thing. Selfie and aurora over New Zealand caught in late April by The Darker Arts.

Deborah Byrd

May 18, 2017

Did this human species coexist with our ancestors?

Fossil remains of Homo naledi found in a South African cave might be the first evidence of another species of hominin coexisting with the first humans in Africa.

Eleanor Imster

May 17, 2017

NASA camera views sunglint from Earth

You'd expect sunglint from an ocean or other body of water. But the camera caught some glints over land as well. A new NASA video explains how scientists solved the mystery.

Editors of EarthSky

May 17, 2017

Rainbow from Shiprock, New Mexico

Shiprock is a beautiful rock formation, rising some 1,583 feet (483 meters) above the high-desert plain of the Navajo Nation in San Juan County, New Mexico.

Deborah Byrd

May 17, 2017