Sentences with phrase «of planetary rings»

«But a dirty secret of planetary rings should be exposed: following exhaustive searches since 2004 using the Cassini spacecraft, it is almost certain that none of the numerous gaps in Saturn's C ring and in its Cassini Division (low density band between Saturn's main A and B rings) harbour any shepherds of the requisite size.»

Chancia and Hedman are well - versed in the physics of planetary rings: both study Saturn's rings using data from NASA's Cassini spacecraft, which is currently orbiting Saturn.

Robin Canup came to the moon problem from studies of planetary rings such as those girding the gas giants.

Through theoretical modeling, Aurélien Crida of the University of Nice Sophia - Antipolis and Sébastien Charnoz of the University of Paris Diderot found that the moon - formation action begins at the edge of a planetary ring, where a satellite can take shape without being shredded by the gravitational pull of the planet.

Not exact matches

said planetary scientist Jeff Cuzzi of NASA's Ames Research Center in Moffett Field, Calif. «To me, this answers the question of what makes the rings red: It's organics.»

Some of them, such as Saturn, Jupiter, Uranus and Neptune, additionally possess planetary rings — a collection of still smaller bodies of different sizes that also orbit a planet.

In a breakthrough study, an international team of scientists, including Professor Nikolai Brilliantov from the University of Leicester, has solved an age - old scientific riddle by discovering that planetary rings, such as those orbiting Saturn, have a universally similar particle distribution.

It is the first time a ring has been discovered around a trans - neptunian object, and it shows that the presence of rings could be much more common than was previously thought, in our Solar System as well as in other planetary systems.

To answer that last question in particular, «you have to fly between the planet and the rings,» says planetary scientist Matthew Hedman of the University of Idaho in Moscow, who uses Cassini data to study the rings.

The scientists» findings could help to increase the understanding of the basic properties of granular gases such as soot agglomeration in flue gases on Earth or in astrophysical phenomena such as cosmic dust in planetary rings in space.

But now, data gathered during five of Cassini's final 22 passes before it plunged into the planet are bringing the mass of the B ring into focus, Luciano Iess, a planetary scientist at the Sapienza University of Rome, announced at the AGU meeting today.

One ring in particular owes its manicured appearance to no fewer than seven moons working together, according to new results released this week at the American Astronomical Society's Division of Planetary Sciences meeting in Provo, Utah.

AUSTIN, TEXAS — Like a planetary jewelry case, our solar system glitters with a dazzling variety of rings.

Those measurements reveal that the B ring, which makes up 80 percent of the total ring mass, is about 15 billion billion kilograms, or 0.4 times that of Saturn's moon Mimas, planetary scientist Luciano Iess of Sapienza University of Rome said at the meeting on December 12.

That's lightweight enough to be young, says planetary scientist Larry Esposito of the University of Colorado Boulder, a longtime old rings proponent who wasn't involved in the new work.

The paper «is a wonderful and gratifying confirmation of what we found several years back,» says planetary scientist and Cassini team member Carolyn Porco of the Space Science Institute in Boulder, Colorado, who worked on the earlier examination of the F ring.

The constituent fragments that lie near the inner, planetary side of the ring should constantly exchange angular momentum with fragments further out.

This spring, Buck Sharpton of the Lunar and Planetary Laboratory in Houston reported evidence that the Chicxulub crater along the Yucatan coast has multiple rings and that its outer ring is nearly 300 kilometres across.

There's not enough pollution in the rings for them to have been around for a long time, argues planetary scientist Paul Estrada of the SETI Institute in Mountain View,

A dark ring of dust and gas circling the star (dark bands, center), material that may one day coalesce into a planetary system, acts like a belt, cinching the nebula into an hourglass shape.

By drilling into a circular ridge inside the 180 - kilometer - wide crater rim, researchers also hope to nail down the processes that form «peak rings»: hallmarks of the largest impact craters, which planetary scientists have seen elsewhere in the solar system but which erosion has erased from other big craters on Earth.

The Little Ghost (right) is a more classic planetary nebula: Its doughnut is the steadily expanding ring of star gas that has been ionized and set aglow by ultraviolet light from the central white dwarf.

The icy fragments would have encircled the solar system's second largest planet as rings and eventually spalled off small moons of their own that are still there today, says Robin Canup, a planetary scientist at the Southwest Research Institute in Boulder, Colo..

The Cassini mission to Saturn has been one of the most successful planetary missions ever, revealing the ringed giant and its moons as never before.

«The three rings around this young star are nested like Russian dolls and undergoing dramatic changes reminiscent of planetary formation,» says Mawet.

The mass and orbit of planetary candidate «b» is similar to 79 Ceti b, depicted at left with rings and two moons, as imagined by Bacon (more from NASA and Astronomy Picture of the Day).

Lecture 9 of Dr. Bruce Betts» 2015 online Introductory Planetary Science and Astronomy course covers Saturn's moon Titan and the Uranian and Neptunian systems including atmospheres, interiors, rings, and moons including Triton.

Lecture 8 of Dr. Bruce Betts» 2015 online Introductory Planetary Science and Astronomy course covers the Galilean Satellites (Io, Europa, Ganymede, Callisto) of Jupiter, and the Saturnian System including atmosphere, interior, rings, and moons including Iapetus and Enceladus.

© Walter Myers — larger image (Artwork from Computergraphic Vistas, used with permission) View of a ringed, planetary candidate «b» from a rocky moon, as imagined by Myers (more).

Composite picture of the Cat's Eye Nebula (NGC 6543), combining three images taken by the Hubble Space Telescope.This planetary nebula has an unusually complicated structure, with concentric shells (seen as bright rings), jets (the projections at upper left and lower right), and a number of details that suggest complex interactions of shock waves.

The vibrations of these rings mirror the actual planetary orbital evolution that unfolds over millions of years, making the approximation quite accurate.

Over at The Planetary Society, Emily Lakdawalla highlighted an image taken by the Cassini spacecraft of Saturn separate from its rings.

Researchers shed light on scientific phenomenon which helps to better understand evolution of interstellar dust and planetary rings in space

Once these planetary bodies acquire enough mass, they dramatically reshape the structure of their natal disk, fashioning rings and gaps as the planets sweep their orbits clear of debris and shepherd dust and gas into tighter and more confined zones.

Though scientists are fairly certain the rings indicate that planets are beginning to form, the structure pictured defies the time line they would have predicted in the process of planetary formation.

He is one of the discovers of the first ring around an asteroid (Chariklo) and with collaborators was the one to first use measurements of planetary transits from space to measure the size of the sun.

A clutch locks the ring gear of the planetary gearset for a 7.0:1 speed reduction and torque multiplication ratio.

Torque biasing - Depending on the tooth ratio's of the planetary, ring and sun gear, the desired ratio can be designed.

The planetary gearset is what's responsible for changing gear ratios, and it consists of a sun gear surrounded by smaller planet gears carried by a planet carrier enclosed in a ring gear.

The planetary gears are comprised of the sun gear, which attaches to the main shaft and the planetary gears, all of which sits inside a ring gear.

It is a moonless night, dark and rare, and the heat is oppressive, the kind of heat where a deep breath leaves you unsatisfied, suspicious that there was nothing life - giving at all in what you've inhaled, and you are left air - hungry, wet at the pits, forehead greasy with sweat, wishing for the night to be over, for your daughters to exhaust their energy, to cool their dense, hot centers enough to sleep for one more night in this summer that seems to stretch into your future like a planetary ring full of debris, circling forever around something it can't escape.

In a simultaneous show at the Andre Zarre Gallery, «Matter in Outer Space,» solid - seeming discs, like the rings of Saturn, floated near black and turquoise planetary forms.