Scientists have analyzed data recorded during the lengthy decent of the US Air Force's Communication/Navigation Outage Forecasting System (C/NOFS) satellite into Earth's atmosphere. The observations will be extremely useful for future operations, significantly improving predictive models for satellite trajectory and re-entry.
Scientists believe that Mars once played host to a much warmer and wetter climate, but for that to be the case it must have once had a thicker atmosphere. There's a big problem with that theory, though, with detected levels of carbon not playing nice with atmospheric loss theories. Now, a joint team from NASA's Jet Propulsion Laboratory (JPL) and the California Institute of Technology (Caltech) believes it may have solved the problem, with a new theory that explains the issue by means of two simultaneous mechanisms.
NASA's Cassini spacecraft has revealed the presence of an enormous cloud located around the Saturnian moon Titan's southern polar region. The discovery comes as the spacecraft nears the end of its mission, which has stretch over a decade-long mission, and characterizes the ringed giant and its moons in spectacular fashion.
What turned Mars from the warm, wet planet that space scientists believe it was in the distant past into the cold, dessicated world of today? NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) is providing part of the answer, as it measures how fast the Martian atmosphere is being lost today. According to the space agency, the culprit is the solar winds, which are slowly stripping away the atmosphere of the Red Planet atom by atom at a rate of roughly 100 gm (3.5 oz) per second and even more during solar storms.
The first color images returned of Pluto by NASA's New Horizons spacecraft reveals blue skies and surface water-ice deposits. Previous non-color images of the dwarf planet's tenuous atmosphere have displayed a surprisingly complex multilayer structure, and the new color images have allowed scientists to deduce the composition of the haze.
A new image release from NASA's New Horizons spacecraft has provided more intriguing views of Pluto, including a stunning shot of the dwarf planet's tenuous atmosphere. Back-lit by the Sun, the image was captured from the probe at a range of 18,000 km, a mere 15 minutes after it made its closest approach on July 14.
A recent study carried out by MIT has characterized the cleansing effect that raindrops have on our atmosphere in removing aerosol and other pollutants from the air. The results of the research could be instrumental in creating reliable forecasts for air quality, and creating more accurate models of climate change impact due to clouds.
A new study has revealed that during the period in which the red planet's distinctive valleys supposedly formed, the Martian atmosphere may have already been too depleted to maintain the free-running water that it is believed to have carved out the geological features.
ESA's Venus Express spacecraft has found the best evidence yet of active lava flows on Venus. Earlier missions to Venus have shown that the surface bears the unmistakable scarring of fierce, ancient volcanic activity. However, prior to Venus express, no mission had been successful in directly imaging clues to contemporary volcanism. This quirk has baffled scientists for years, as it has long been assumed that Venus hosts an internal heat source, and that heat has to escape somehow.
A team of scientists from MIT has put forward a theory that would explain the presence of enormous polar cyclones present on the gas giant Saturn. The cyclones, first discovered by the Cassini spacecraft in 2008, are so massive that they could swallow the Earth in their expanse. The research may even lead to better characterization of the atmosphere of distant exoplanets.