The recent El Niño has driven a rise in atmospheric CO2. Scientists expect it to surpass 400 parts per million for the year and stay there at least a human lifetime.

Eleanor Imster

June 15, 2016

Why your GPS twinkles

Radio signals twinkle much as stars do. This can have an effect on your GPS.

Eleanor Imster

June 14, 2016

Humans domesticated dogs twice, says study

New research suggests that dogs were domesticated not once, but twice, in different parts of the world.

Eleanor Imster

June 7, 2016

SDO peers into huge coronal hole

A NASA animation from May 17-19, 2016 shows a coronal hole in our sun's hot outer atmosphere, or corona. Should we be scared?

Deborah Byrd

Eleanor Imster

May 31, 2016

Is dark matter made of black holes?

What if if dark matter consisted of a population of black holes similar to those detected by LIGO last year? A new study analyzes this possibility.

Deborah Byrd

Eleanor Imster

May 28, 2016

Clues to birth of supermassive black holes

Astrophysicists have taken a major step forward in understanding how these monster black holes are born.

Eleanor Imster

May 28, 2016

Saturn’s south polar vortex

A monstrous vortex sits at Saturn's south pole. It's not just beautiful. It also lets astronomers peer deep into Saturn's dense atmosphere.

Deborah Byrd

Eleanor Imster

May 28, 2016

Eleanor Imster

Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.