High levels of molecular chlorine found in arctic atmosphere

Scientists studying the atmosphere above Barrow, Alaska, have discovered unprecedented levels of molecular chlorine in the air, a new study reports.

Scientists solve a decades-old mystery in the Earth's upper atmosphere

New research published in the journal Nature resolves decades of scientific controversy over the origin of the extremely energetic particles known as ultra-relativistic electrons in the Earth's near-space environment and is likely to influence our understanding of planetary magnetospheres throughout the universe.

Sounding rocket to study electric currents in atmosphere

Swirling through Earth’s upper atmosphere is a layer of charged particles called the ionosphere. Constantly on the move, currents through the ionosphere can be much more complicated than winds at lower altitudes, because the currents vary in concert with magnetic fields around Earth and solar activity.

The tropical upper atmosphere "fingerprint" of global warming

In the tropics at heights more than 10 miles above the surface, the prevailing winds alternate between strong easterlies and strong westerlies roughly every other year.

Video: Analyzing the atmospheres of far-off worlds

Gone are the days of being able to count the number of known planets on your fingers. Today, there are more than 800 confirmed exoplanets - planets that orbit stars beyond our sun - and more than 2,700 other candidates.

NASA: Limited Martian atmosphere is still dynamic

Mars may have lost much of its original atmosphere, but what's left remains quite active, recent findings from NASA's Mars rover Curiosity indicate.

Microbes piggy-back on dust clouds

A new study has found that many microbes are able to cross the Pacific Ocean on dust plumes.

The changing seasons of Saturn’s Titan moon

For the first time, NASA’s Cassini spacecraft has recorded the effect of changing seasons on Saturn’s Earth-like moon Titan.

Rover examines changes in Martian atmosphere

Data from NASA's Curiosity rover is helping to explain how Mars may have lost much of its original atmosphere, leaving it with 100 times less than Earth.

Helium found in moon's atmosphere

Observations from NASA's Lunar Reconnaissance Orbiter (LRO) have revealed the presence of helium in the thin atmosphere surrounding the moon.

A new way to learn about exoplanets

Astronomers have used a new technique to study the atmosphere of a 'hot Jupiter' exoplanet.

Arc of Venus could explain atmospheric mystery

As Venus made its transit the sun, spacecraft and ground-based telescopes ahave been looking for a phenomenon that's only recently been explained: the Arc of Venus.

Fossil raindrop impressions reveal Earth's early atmosphere

Scientists have concluded that the Earth's early atmosphere was loaded with greenhouse gases - by examining fossilized raindrop impressions.

Early Earth had periodic organic haze

The early Earth flipped back and forth between a hydrocarbon-free atmosphere and a hydrocarbon-rich one similar to that of Saturn's moon, Titan.

Oxygen found around Saturnian moon

Observations from NASA's Cassini spacecraft have revealed an oxygen atmosphere around Saturn's moon Dione.

'Waterworld' planet discovered

Astronomers using the Hubble Space Telescope have identified a new type of planet - a waterworld surrounded by a thick, steamy atmosphere.

Martian atmosphere is full of water

The Martian atmosphere contains water vapor in a supersaturated state, say surprised ESA scientists.

And the weather on Venus...

While Venus's weather at ground level is pretty boring - a steady 800 degrees Farenheit and heavy sulfuric acid clouds - it all gets a bit more interesting further up, say NASA scientists.

Juno is on its way to Jupiter

The solar-powered Juno spacecraft lifted off aboard an Atlas V rocket this morning and began its five-year journey to the planet Jupiter.

Asteroid impact caused huge scar on Jupiter

A massive scar that appeared in Jupiter's atmosphere last summer was caused by an asteroid 'the size of the Titanic', says NASA.