Enjoying EarthSky? Subscribe.

208,759 subscribers and counting ...

Posts by David Callejas

Science Wire | Jun 02, 2014

Two planets destined to die as their star expands

You know how our sun will someday swell to a red giant, swallowing the planets Mercury and Venus? These two distant exoplanets will suffer a similar fate.

Illustration by Haven Giguere
Science Wire | May 28, 2014

Diamond planets more common than astronomers thought?

Study suggests that extraterrestrial worlds can be extremely diverse in their chemical compositions, including many that are drastically different from our earthly experience.

Possibly habitable environs
Braided fluvial channels (inset) emerge from the edge of glacial deposits roughly 210 million years old on the martian volcano Arsia Mons, nearly twice as high as Mount Everest. (Colors indicate elevation.) Image credit: NASA/Goddard Space Flight Center/Arizona State University/Brown University
Science Wire | May 28, 2014

Habitable environment on Martian volcano?

A volcano erupting under an immense glacier would have created large lakes of liquid water on Mars in the relatively recent past. And where there’s water, there’s the possibility of life.

Australian drought, via GreenPacks
Science Wire | Jan 13, 2014

Seeking safe havens for biodiversity, as climate changes

Australian researchers say their new technique will help them find sites where populations of organisms can potentially survive, as rainfall continues to decline.

Today's Image | Oct 29, 2013

Heat from the lava flows at Klyuchevskaya

A recently released NASA image of the ongoing 2013 eruption at Klyuchevskaya, one of Russia’s tallest and most active volcanoes.

Today's Image | Oct 07, 2013

Draconid meteors

A couple of Draconid meteors caught on camera by Richard Turner in early October, 2011.

Today's Image | Sep 17, 2013

Venus and Saturn above the fog

Venus and Saturn above the fog on Sunday September 15, 2013 about 65 minutes after sunset photographed by Bob King aka Astro Bob.

Today's Image | Sep 16, 2013

Infrared star trails over Texas

Star trails in the Texas night sky – in infrared, popularly known as “heat radiation” – from EarthSky Facebook friend Manish Mamtani Photography.

Photos | Sep 12, 2013

Frog photobombs NASA moon launch

NASA has confirmed this is a real photo. This frog made its giant leap for frogkind during the launch of NASA’s LADEE moon craft on September 6.

Herpsilochmus stotzi
Today's Image | Aug 30, 2013

This bird was unknown to science

Scientists say the discovery of this Herpsilochmus stotzi, and 14 other new Amazonian bird species, highlight how little we really know about species diversity in the Amazon.