New observations from the Cassini spacecraft now at Saturn indicate the particles comprising one of its most prominent rings are trapped in ever-changing clusters of debris that are regularly torn apart and reassembled by gravitational forces from the planet.
The left image is a false-color view of Saturns A ring from the ultraviolet imaging spectrograph instrument aboard the Cassini spacecraft. The ring is bluest in the center, where the gravitational clumps are largest. The thickest black band in the ring is the Enke Gap, and the thin black band further to the right is the Keeler Gap. The right image is a computer simulation about 150 meters (490 feet) across, illustrating a clumpy region of particles in the A ring. The particles are moving counterclockwise, from bottom to top. Credit: NASA/JPL/University of Colorado
According to University of Colorado at Boulder Professor Larry Esposito of the Laboratory for Atmospheric and Space Physics, particle clusters in the outermost main ring, the A ring, range from the size of sedans to moving vans and are far too small to be photographed by the spacecraft cameras. The size and behavior of the clusters were deduced by a research team observing the flickering starlight as the ring passed in front of several stars in a process known as stellar occultation, he said.
This is the first time scientists have been able to measure the size, orientation and spacing of these particle clumps in Saturns rings, he said. Esposito is the science team leader for the Ultra Violet Imaging Spectrograph, or UVIS, a $12.5 million instrument designed and built at CU-Boulder that is riding on Cassini.
Larry Esposito | EurekAlert!
Further Improvement of Qubit Lifetime for Quantum Computers
09.12.2016 | Forschungszentrum Jülich
Electron highway inside crystal
09.12.2016 | Julius-Maximilians-Universität Würzburg
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine