A puzzle about our Solar System – how long is a day on Saturn? – has been decided on new data analysis. This figure was hard to reckon because the hostile has no firm surface, so there are no geographical features that can follow if the planet rotates. In addition, a magnetic field makes the speed of rotation hard to see.
But now NASA scientists have used data from Cassini's space to pin down a definitive answer: a day on Saturn is ten hours, 33 minutes, and 38 seconds long. The new day of 10:33:38 is somewhat shorter than the previous estimate, as the 10:39:22 estimates of 1981 based on magnetic field data from Voyager.
The new figure was calculated by looking at Saturn's rings, of which Cassini collected many detail data in his 1997 mission in the run-up to his final destruction in & # 39; e sphere of & plan's in 2017. In & # 39; From Saturn from 2004, the aircraft's high-resolution images fell from the planet and data on their cycling, fuzzy rings. These data were then used by graduate student Christopher Mankovich to study well patterns in other rings.
It was found that the rings act as a type of seismometer, responding to swimming pools that occurred on a planet. If the inner flow of the planet finds flake and earthquake, free the variants variants on the gravitational field of & # 39; the planet, and these variants are handed over to more rings. "Particles in the rings cannot help but feel these swings in the difficult field," said Mankovich in a statement. "At specific locations in rings, these ring oscillations have just the right time in their cuttings to slowly build energy, and that energy is being carried out as conceivable heat."
This means that scientists can now activate the movements of the interior of the planet, and of these they can see rotation. This is what they have to reach the exact length of a day on Saturn. "The researchers used probes in one of the rings to store the internet of Saturn, and chose the long-lasting, complete characteristic of the planet. And it's a real fix," said Cassini Project Scientist Linda Spilker same explanation. "The rings kept the answer."
The paper is available in the physical archive arXiv.