Paul Scott Anderson
TGO orbiting Mars.

The strange case of Mars’ disappearing methane

In 2013, in a big success story, a Mars rover and orbiter made a near-simultaneous observation of methane in Mars’ atmosphere. Now a newer mission orbiting Mars – ESA’s Trace Gas Orbiter – has failed to detect methane. Why?

Solar eruption on the sun.

When and how it rains on the sun

Rain takes different forms on the planets and moons of our solar system. But it also “rains” on the sun, as electrified gas drips from giant magnetic loops in the sun’s outer atmosphere. Read about the sun’s coronal rain.

Moon and Earth.

Watch the Israeli moon landing April 11

Israel’s Beresheet spacecraft will attempt the country’s 1st-ever and 1st commercial landing on the moon on Thursday, April 11. The landing is expected between 19:00 and 20:00 UTC (2 to 3 p.m. CDT).

Mars Express orbiting Mars.

Scientists close in on mysterious Mars methane

For the first time, an in-situ measurement of methane on Mars – made by NASA’s Curiosity rover – has been independently confirmed from orbit, by ESA’s Mars Express. Could it be a clue to Mars life?

Thin slice of meteorite.

New evidence for life in a Martian meteorite?

The discovery of fossilized microbes in Martian meteorites has been claimed before. Now scientists in Hungary add a new study of the ALH-77005 meteorite, with some intriguing new evidence.

Long, thin dark streaks on the wall of a crater.

Did deep groundwater cause these mysterious dark streaks on Mars?

Mars is a cold, dry desert, but a new study provides tantalizing evidence for liquid water deep below its surface. If it exists, this Mars groundwater might cause the weird dark streaks in Martian craters and canyons.

Dust devil tracks.

See Mars via images from ExoMars orbiter

These images from ESA’s ExoMars orbiter show Mars in all of its diverse geological wonder. Also, if you look carefully, you can spy NASA’s newest Mars mission, the InSight lander!

A barren, red-walled canyon with water - perhaps an inlet from the surrounding sea - at its base.

NASA and Google partner on Mars exploration

Devon Island in the Arctic is one of Earth’s most Mars-like places. NASA is there, training scientists and testing technologies for future Mars exploration. Now Google has joined in, to bring Devon Island’s Mars-like wonders to you.

Triton as seen by Voyager 2.

NASA proposes mission to Neptune moon Triton

Triton is Neptune’s largest moon. It’s a bizarre and geologically active world – a possible ocean moon – visited by Voyager 2 in 1989. Now, NASA has proposed a new mission called Trident to sweep past Triton again in 2038.

Robot particle disks.

Say hello to particle robots

Roboticists are fundamentally rethinking their craft. Particle robots don’t look like biological creatures, but they’re constructed like biological systems, vast in complexity and abilities, yet composed of simple parts. Are they a step toward the proverbial ‘gray goo’?