Many city surfaces are coated with a layer of soot, pollutants, metals, organic compounds and other molecules known as "urban grime." Chemical reactions that occur in this complex milieu can affect air and water quality. Now, researchers reporting in ACS Earth and Space Chemistry have taken a closer look at urban grime collected from two U.S. cities, revealing for the first time that the material absorbs sunlight and therefore might participate in photochemical reactions.
Tropical cyclones can become post-tropical before they dissipate, meaning they can become sub-tropical, extra-tropical or a remnant low-pressure area. NASA's Aqua satellite provided a visible image that showed Typhoon Kujira transitioning into an extra-tropical storm, and the effects of strong wind shear on the system.
"Flutter" is a complex oscillatory phenomenon that can destroy aircraft turbine blades and has historically been the cause of several plane accidents. Now, scientists at Tokyo University of Science and the Japan Aerospace Exploration Agency explore a novel approach that can be used to early detect the onset of flutter, solving one of the main problems that has been holding back the design of lighter and more efficient turbines.
Venus might not be a sweltering, waterless hellscape today, if Jupiter hadn't altered its orbit around the sun, according to new UC Riverside research.
NASA's Terra satellite used infrared light to identify strongest storms and coldest cloud top temperatures in Typhoon Kujira as it tracked through the northwestern Pacific Ocean.
A CU Boulder astrophysicist is searching the light coming from a distant, and extremely powerful celestial object, for what may be the most elusive substance in the universe: dark matter.
Earth could have lost anywhere between ten and 60 per cent of its atmosphere in the collision that is thought to have formed the Moon.
Geoscientists from Goethe University have found the largest extraterrestrial diamonds ever discovered - a few tenths of a millimetre in size nevertheless - inside meteorites. Together with an international team of researchers, they have now been able to prove that these diamonds formed in the early period of our solar system when minor planets collided together or with large asteroids. These new data disprove the theory that they originated deep inside planets - similar to diamonds formed on Earth - at least the size of Mercury (PNAS).
A study of comet motions indicates that the Solar System has a second alignment plane. Analytical investigation of the orbits of long-period comets shows that the aphelia of the comets, the point where they are farthest from the Sun, tend to fall close to either the well-known ecliptic plane where the planets reside or a newly discovered 'empty ecliptic.' This has important implications for models of how comets originally formed in the Solar System.
NASA analyzed the cloud top temperatures in Tropical Storm Kujira using infrared light to determine the strength of the storm. Infrared imagery revealed that the strongest storms were around Kujira's center and in a band of thunderstorms on the western side of the storm.