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Amazing moons of our solar system

Yes, we're eager to explore the other planets in our solar system. But their moons might be even more interesting ...

April 5, 2016

How to make a mountain on Mars

They're not mountains in the earthly sense. They're mile-high mounds, which - a new study says - were carved over billions of years by wind and climate.

Deborah Byrd

April 4, 2016

Eclipse stories from Indonesia

The solar eclipse of March 9, 2016 brought together students from around the world - and EarthSky helped to make it happen.

Graham Jones

April 4, 2016

Another asteroid clobbers Jupiter

Giant Jupiter is a frequent target for asteroid strikes, in part because of its size. This impact is the 5th we've seen in the past decade.

Deborah Byrd

April 2, 2016

Global astronomy month begins April 1

April, 2016, is Global Astronomy Month 2016 (#GAM2016), organized by Astronomers Without Borders, whose motto is One People One Sky.

Deborah Byrd

March 31, 2016

The extremely hot heart of quasar 3C273

Scientists combined telescopes on Earth and in space to learn that this famous quasar has a core temperature hotter than 10 trillion degrees! That's much hotter than formerly thought possible.

Deborah Byrd

March 30, 2016

Oddball hot Jupiter has wildly eccentric orbit

Researchers have studied how the exoplanet’s temperature changes as it approaches, sweeps by, and moves away from its star.

Editors of EarthSky

March 29, 2016

Could our sun emit killer superflare?

Solar eruptions from our sun are nothing compared to eruptions from some other stars - so-called 'superflares'. Two scientists say our sun could also be a superflare star.

EarthSky Voices

March 27, 2016

Closest comet in 246 years via radar

Record-breakingly close flybys of two comets earlier this week. Radar images of one, the closest comet in 246 years. Will the other be visible to the eye?

Eddie Irizarry

March 26, 2016