Why is Saturn's small satellites are in the form of ravioli: Data from close Cassini show that they are covered with dust and ice from the rings of the planet that are going around the equator, as "little skirt"
- In the period from December 2016 to April 2017, Cassini made a close 6 ring spans months
- A new study of Cassini data, showed they acquire the material of the rings
- Those who are located further in the rings and collect the icy material from Enceladus
- Due to its high porosity, the researchers say that the Matrial accumulate near the equator
Life inside the rings of Saturn with the & # 39 is a dirty business.
According to the next span of the spacecraft Cassini five mini-satellites orbiting the massive planet, these small satellites are covered with debris ring material, including dust and ice particles blown from more than a month, Enceladus.
Due to the porous nature of these little months, the scientists say they scooped up excess material and wear it as a skirt around the equator – finally explain why many of them are similar to dumplings.
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Life inside the rings of Saturn with the & # 39 is a dirty business. According to the next span of the spacecraft Cassini five mini-satellites orbiting the massive planet, these small satellites are covered with debris ring material, including dust and ice particles are blasted with Enceladus
How long is this Day on Saturn?
After decades of uncertainty, scientists finally found the length of the day on Saturn.
a kind of magnetic field and the free surface of Saturn's landmark has long stood in the way of the ability of scientists to determine the speed of its rotation.
But, thanks to the data Cassini, they are now able to reveal the secret.
Vibration selected particles in the planet rings provided in the window movement inter & # 39; Saturn career for the first time, opening the day on ice planet only lasts 10 hours 33 minutes and 38 seconds.
According to a recent study published in the journal Astrophysical Journal, the ring particles react to the vibrations inside of Saturn as well as a seismometer in earthquake force.
This leads to a measurable wave pattern.
Previous attempts to narrow down the day of Saturn appreciated it in 10 hours, 39 minutes and 23 seconds, based on what was known about its magnetic field from the radio signals captured by Voyager in 1980.
Other based on data Cassini, he suggested that it may fall anywhere between 10 hours and 36 minutes to 10 hours and 48 minutes.
"Bold, close flyby of the odd little months let's look closely at the way they interact with the rings of Saturn," said Bonnie Burratti of the NASA Jet Propulsion Laboratory.
"We are seeing more and more evidence is extremely active and dynamic Saturn ring system and months.
The researchers used data collected during Cassini's close approach to the front of his finals in 2017, when he received his best views of Saturn and many of the & # 39; objects in its vicinity.
In addition to confirming that they acquire the material of the rings, the team found these small satellites – including the Atlas, the Lord, Daphnis, Epimetheus and Pandora – highly porous.
"We found these months scooped ice particles and dust from the rings to form a small skirt around the equator, Buratti said.
"The denser housing is more spherical because gravity would pull the material.
Daphnis and Pan, the two who sit closer to Saturn, saw the biggest impact of his ring materials.
Atlas, Prometheus and Pandora, on the other hand is covered over with ice particles which are sprayed with Enceladus.
The team used data from Cassini's visible and infrared Mapping Spectrometer (VIMS) to create a spectral map of the Lord, and refine our understanding of the composition of five months.
In the period from December 2016 to April 2017, Cassini completed the six closest ring spans satellites, obtaining unprecedented detail on their make-up and appearance.
Toward a & # Saturn 39 is a redder shades, as well as the core ring. Golubev remaining significantly.
There's still much to learn about these satellites and their formation, and researchers will use the Cassini data to simulate new scenarios, which could help to put it all together.
Accretion causes a strange form months can give us an idea of the rings of Saturn, too.
Due to the porous nature of these little months, the scientists say they scooped up excess material and wear it as a skirt around the equator – finally explains why many of them are similar to dumplings
"Perhaps this process occurs within the ring, and the largest particles of the ring and the ring material accreting around them, said Cassini Project Scientist Linda Spilker.
"Detailed view these little months of rings can tell us more about the behavior of the ring particles themselves.
And, the researchers say that the models created using data from Cassini may help us to understand the other planets in our solar system.
"Do any of the months of the ice giant planets Uranus and Neptune are interacting with their thin rings to form a function similar to those in the ring of Saturn's moons," said Buratti.
"These questions need to be answered future missions.