Latest Planetary atmospheres Stories
A new study, funded in part by the Naval Research Laboratory (NRL) and the National Aeronautics and Space Administration (NASA) reports that exhaust from the space shuttle can create high-altitude clouds over Antarctica mere days following launch, providing valuable insight to global transport processes in the lower thermosphere.
A burst of mesospheric cloud activity over Antarctica in January 2003 was caused by the exhaust plume of the space shuttle Columbia during its final flight, reports a team of scientists who studied satellite and ground-based data from three different experiments. The data also call into question the role these clouds may play in monitoring global climate change.
A new research radar based in Antarctica is giving scientists the chance to study the highest layer of the earthâ€™s atmosphere at the very edge of space.
"CSI-like" techniques, used on minerals, are revealing the steps that led to evolution of the atmosphere on Earth. There is now a growing consensus by the scientific community of what happened to produce the protective ozone layer and atmosphere on our planet.
During its closest flyby of Saturn's moon Titan on April 16, the Cassini spacecraft came within 1,027 kilometers (638 miles) of the moon's surface and found that the outer layer of the thick, hazy atmosphere is brimming with complex hydrocarbons.
A new University of Colorado at Boulder study indicates Earth in its infancy probably had substantial quantities of hydrogen in its atmosphere, a surprising finding that may alter the way many scientists think about how life began on the planet.
"The presence of features seen in Cassini's radar data would suggest that ammonia is at work on Titan, powering cryovolcanism. Cryovolcanism - water-ice volcanism - requires a liquid layer in the interior of Titan. It also requires an agent to lower the melting point density and mobility of liquid water. Ammonia does all these very well.
Like Earth and Venus, the night side of Mars emits a subtle glow. In this interview with Astrobiology Magazine, Jean-Loup Bertaux, Principal Investigator for the Mars Express SPICAM instrument, explains what lights up the martian evening sky, and why our understanding of that process could aid future missions to Mars.
The Earth is a dynamic entity, and scientists are trying to understand it. Various things in nature grow and shrink, such as ice sheets, glaciers, forests, rivers, clouds and atmospheric pollutants, serving as the pulse of the planet and affecting many people in many walks of life.
The probe orbiting Saturn is not the only eye on Titan, the ringed planet's largest moon. Powerful ground telescopes have glimpsed storms travelling around the moon's mid-latitudes, not just near the south pole. One theory of how these storms arise relies on icy volcanoes beneath the thick haze and clouds.
Earth's Atmosphere -- Earth's atmosphere consists of nitrogen (78.1%) and oxygen (20.9%), with small amounts of argon (0.9%), carbon dioxide (variable, but around 0.035%), water vapor, and other gases. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night. 75% of the atmosphere exists within 11km of the planetary surface. Temperature and the Atmospheric Layers The temperature of the Earth's atmosphere...
Sky -- Although almost everyone have seen it, sky is hard to be defined precisely. Generally, sky is the space seen when one looks upward from the surface of a planet. Some people define sky as the denser gaseous zone of a planet's atmosphere. Clouds, rainbows and weather all occur amongst a planet's sky. In astronomy, the sky is divided into many regions, called constellations. The blue colour of the daytime sky results from the selective scattering of light rays. When the sunlight...
Saturn's moon Titan -- Titan is the planet Saturn's largest moon. It is larger than either of the planets Mercury or Pluto and is the second-largest moon in the solar system after Ganymede (it was originally thought to be slightly larger than Ganymede, but recent observations have shown that its thick atmosphere caused overestimation of its diameter). Titan was discovered on March 25, 1655 by the Dutch astronomer Christian Huygens, making it one of the first non-terrestrial moons to be...
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