Articles tagged with Planetary Rings
The discovery of a blue ring around Uranus reveals similarities with Saturn's E ring, both associated with small moons. Researchers attribute the blue color to gravitational forces acting on dust particles that allow smaller ones to survive while larger ones are recaptured by the moon.
A new Cassini image shows the A ring contains more debris than previously reported, indicating a higher opacity of up to 35 percent. The particles in the ring are trapped in ever-changing clusters that are regularly torn apart and reassembled by gravitational forces.
Astronomers have found a blue ring around Uranus, similar to Saturn's blue ring in Enceladus' orbit, attributed to submicron-sized material and subtle forces acting on dust particles. The discovery suggests that the two outer rings share a common explanation for their blue color.
Astronomers discover that Uranus' blue ring is predominantly made of submicron-sized material, unlike most other rings which appear red. The similarity between the outer rings suggests an in-kind explanation for their blue color.
The Cassini spacecraft has discovered four faint propeller-shaped double streaks in the mid-A Ring of Saturn, suggesting the presence of intermediate-sized moonlets. These findings provide evidence that Pan and Daphnis are part of a larger population of ring moons, shedding light on Saturn's ring formation and planetary evolution.
Scientists have discovered evidence of moonlets in Saturn's rings, bridging the gap between larger moons and smaller ice particles. This finding supports the theory that Saturn's rings were formed when another object fragmented close to the planet, with the discovery providing insight into the origin of planets.
Scientists have found evidence of volcanic activity on Enceladus, a key player in shaping the E ring. The discovery sheds light on the dynamics of ice particles in Saturn's system and challenges existing assumptions about how the moon contributes to the ring's mass distribution.
Astronomers have discovered two bright debris disks around nearby stars, similar to our own solar system's Kuiper Belt. These narrow disks are believed to be shaped by the presence of a star-like companion that continually grooms their edges.
Astronomers observed thin, parallel striations like spokes on a pinwheel within Saturn's outer rings, providing clues about ring thickness and dynamics. The findings give scientists new insights into the micro-structure of the rings and will help estimate their overall thickness.
The Cassini mission reveals that Prometheus creates regular patterns in the F ring, including channels and streamers, by gravitationally extracting material from the ring. This phenomenon poses unique challenges to understanding ring-satellite interactions.
Researchers have discovered ever-changing clusters of debris in Saturn's A ring, with cluster cores ranging from 7 feet to 43 feet in size. The clusters are periodically torn apart by gravitational tides and reassembled into new configurations.
Scientists have found that parts of the D ring have relocated and dimmed, indicating very short evolutionary lifetimes. The Cassini mission has also revealed a spiral structure in the F ring, which may be caused by moons crossing the ring and spreading particles around.
Researchers used ocean sound waves to track the Indian Ocean tsunami quake's movement, revealing a slower speed than expected. A new model for raindrop formation may improve understanding of Earth's climate and cloud formation.
Astronomers discover a perturbed dusty belt around Fomalhaut, indicating the presence of a planet. The discovery provides valuable insights into debris disks and planetary formation.
Cassini mission data reveals the formation of molecular oxygen atmospheres in Saturn's rings without life present. This finding suggests that oxygen can be produced through non-biological means, complicating the search for life beyond Earth.
A team of astronomers led by Clarke gathered data on Saturn's aurora using Cassini and Hubble spacecraft. Their observations revealed that Saturn's aurora differ in character from day to day, with varying lengths and behaviors compared to Earth's and Jupiter's.
Scientists have found that Saturn's system is composed of ice and oxygen atoms, which are produced by collisions between small icy moons and the planet's magnetosphere. The research suggests that these collisions have been occurring for millions of years, adding fresh material to the ring system.
The Cassini spacecraft detected a massive cloud of escaping oxygen atoms on the dark side of Saturn's rings in January 2004. Scientists believe that the sudden release could be caused by a collision between ice particles and material in one of the main ring systems, or an eruption of icy slush on Enceladus.
Recent Keck Telescope images of Uranus reveal an inner ring and high-altitude clouds with vigorous convection, indicating the planet is not static. The findings contradict previous assumptions about Uranus being a dull and unchanging planet.
Researchers from University of Colorado Boulder analyze Cassini mission data, revealing compositional variation in Saturn's A, B, and C rings. The study suggests that the outer part of the rings contains more ice, shedding light on their origin and evolution.
The Cassini-Huygens spacecraft has successfully landed at Saturn, providing unprecedented insights into the planet's rings, moons, and atmosphere. The four-year mission will explore Titan, Saturn's largest moon, and shed light on the origin and evolution of planetary systems.
The Cassini orbiter is equipped with 12 scientific instruments to study Saturn's rings and moons. The UVIS instrument will measure UV light reflected by or emitted from Saturn's atmosphere, its rings, and moon atmospheres.
The University of Chicago High Rate Detector will study the physical, chemical and dynamical properties of trapped Saturnian dust. The instrument is capable of detecting 100,000 particles per second, measuring particles ranging from human hair to smaller particles.
New calculations suggest that recycling of material through small moons can lengthen the lifetime of rings and moons. This process, known as cosmic recycling, allows for the re-accretion of fragments into new moons, extending the persistence of ring systems.
New theory explains why circumstellar Keplerian disks are stable around Be stars, contradicting previous model's predictions. The Magnetically Torqued Disk model suggests a narrow range of star types can form detectable disks.
The Chandra X-ray Observatory has imaged the full impact of Supernova 1987A for the first time, revealing a shock wave smashing into the outer parts of a ring at 4,500 km/s. The gas behind the shock wave has a temperature of ten million degrees Celsius.
New radio observations reveal that black holes in galaxies can be fed with gas, while the surrounding material remains intact. In NGC1097, a barred galaxy with a massive central black hole, researchers found that gas flows towards the black hole through a shock front, which is then redirected along the bar by magnetic fields.
Scientists discover Jupiter's ring system is composed of dust kicked up by meteoroids striking four inner moons, with the outermost ring consisting of two embedded rings. The system provides a unique dynamical laboratory for studying the solar system's early processes.
A team at University of Colorado at Boulder has found a faint, doughnut-shaped ring of interplanetary and interstellar dust orbiting Jupiter. The ring is much larger and more sparse than previously detected rings, and most particles in it move in the opposite direction to Jupiter's rotation.
The CU instrument package will study Saturn's spectacular ring system, moons and atmospheric gases. It will analyze the atmosphere of Titan, a moon with conditions similar to early Earth.
Astronomers predict that the debris cloud from Supernova 1987A will continue to expand and brighten over the next decade, reaching its final stage by 2007 A.D. The ring of hydrogen gas surrounding the supernova is expected to increase in brightness by a factor of 1,000.
A new study led by a University of Colorado astrophysicist suggests that dust grains dominating Jupiter's peculiar ring may have lifetimes of just hours or days. The study indicates the swelling of the inner ring is caused by positive electrical charges on the dust grains resulting from solar radiation.