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Photo: NASA/JPL-Caltech/SScI

Saturn's wiggles create waves in the planet's iconic rings, according to a new study.

Why it matters: The findings could help scientists learn more about the inner workings of Saturn and other worlds like it out there in the galaxy.

Details: The new study in the journal Nature Astronomy suggests movements in Saturn's interior create ripples in its rings that were spotted by scientists during the Cassini mission, which ended in 2017.

  • "We used Saturn's rings like a giant seismograph to measure oscillations inside the planet," Jim Fuller of Caltech, an author of the study, said in a statement. "This is the first time we've been able to seismically probe the structure of a gas giant planet, and the results were pretty surprising."
  • By using those oscillations, the scientists were able to find that Saturn's core may actually be a "fuzzy" soup made of ice, metallic fluids and rock, according to the study.
  • The study also shows the planet's core is larger than expected at 55 times the mass of Earth.

The big picture: NASA's Juno probe at Jupiter has also found some evidence the huge gas giant's core is fuzzy.

  • "The fuzzy cores are like a sludge. The hydrogen and helium gas in the planet gradually mix with more and more ice and rock as you move toward the planet's center," Christopher Mankovich of Caltech, one of the authors of the study, said in the statement.
  • "It's a bit like parts of Earth's oceans where the saltiness increases as you get to deeper and deeper levels, creating a stable configuration."

Go deeper

Study: Vast majority of fossil fuels needs to stay in ground to hit Paris targets

Phillips 66 oil refinery from Ken Malloy Harbor Regional Park, Wilmington, Calif. (Citizen of the Planet/Education Images/Universal Images Group via Getty Images)

Vast quantities of oil, natural gas and coal need to stay in the ground in order for the world to have even a 50% chance of meeting the Paris Climate Agreement's temperature target, a new study finds.

Why it matters: The research paints a stark picture of a world in which fossil fuel production must begin declining either now or within the next few years.

Gaming CEO calls on industry to help fight climate change

"Catalyst Black." Screenshot: Super Evil Megacorp

Gaming CEO Kristian Segerstrale is calling on leaders in his industry to take action on climate change, after completing a $1.4 million fundraising campaign this summer.

Why it matters: Gaming's pandemic-fueled boom creates an opportunity, and maybe even an obligation, to do some good.

3 hours ago - World

U.S. releases updated vaccination, testing rules for foreign travelers

Photo: Patrick T. Fallon/AFP via Getty Images

Foreign travelers will be allowed entry to the U.S. beginning Nov. 8 if they can provide proof of full COVID-19 vaccination with a shot authorized by the World Health Organization and a negative test within three days of departure, the White House announced Monday.

Why it matters: The updated guidance, which exempts children under the age of 18 from the vaccine requirement, is intended to provide further clarity for airlines and foreign nationals who have been restricted from traveling to the U.S. since early 2020.