New evidence from Australia of an enormous asteroid that struck Earth 3.4 billion years ago, triggering earthquakes and tsunamis and causing cliffs to crumble.

Eleanor Imster

May 21, 2016

Your top 4 questions about tornadoes

May is the peak month for twisters here in the U.S.

Eleanor Imster

May 17, 2016

Acadia at 3 a.m.

Tom Wildoner captured this view on May 12 in Maine's Acadia National Park. See bright Mars on the right.

Eleanor Imster

May 15, 2016

New look at Mercury’s peaks and valleys

First global topographic map of Mercury shows the whole surface of our solar system's innermost planet. MESSENGER mission scientists used 100,000 images to create it.

Eleanor Imster

May 14, 2016

Volcanic eruption in far south Atlantic

If it weren't for satellites, the eruption on Bristol island might have gone unnoticed. Instead, here are pics.

Eleanor Imster

May 12, 2016

Kepler confirms 1,284 new planets

The announcement more than doubles Kepler's confirmed exoplanets and suggests that, somewhere out there, we'll discover another Earth.

Eleanor Imster

May 11, 2016

Watch SpaceX Dragon depart ISS May 11

The SpaceX Dragon cargo spacecraft, carrying valuable science research, will depart from the International Space Station (ISS) and return to Earth. Watch it live.

Eleanor Imster

May 10, 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.