Tue Nov 12 03:06:32 UTC 2024: ## Voyager 2’s Uranus Flyby Misled Scientists: New Study Reveals
**Pasadena, CA -** A new study has revealed that NASA’s Voyager 2 spacecraft encountered Uranus during a rare and intense solar wind event in 1986, leading to misleading observations about the planet’s magnetic field.
Researchers reanalyzing data from the flyby discovered that Voyager 2 arrived just days after the solar wind had compressed Uranus’ magnetosphere to a mere 20% of its normal size. This unusual event, occurring only 4% of the time, caused scientists to underestimate the true size and strength of the magnetosphere.
“We would have observed a much bigger magnetosphere if Voyager 2 had arrived a week earlier,” said lead author Jamie Jasinski of NASA’s Jet Propulsion Laboratory.
The findings suggest that Uranus’ magnetosphere is likely similar to those of Jupiter, Saturn, and Neptune, contrary to previous assumptions. The compressed magnetosphere also impacted observations about the presence of plasma and high-energy electrons around the planet.
“The plasma environment of any planetary magnetosphere is usually formed of plasma from the solar wind, plasma from any moons present inside the magnetosphere and plasma from the atmosphere of the planet,” said Jasinski. “At Uranus, we did not see plasma from the solar wind or from the moons. And the plasma that was measured was very tenuous.”
The study also challenges the previous understanding of Uranus’ moons, Titania and Oberon, which were thought to orbit outside the magnetosphere. The new findings indicate that these moons likely stay within the protective magnetic bubble, making it easier to detect potential subsurface oceans.
Scientists are eager to learn more about the potential for life on these moons, as they are considered prime candidates for hosting liquid water.
“A future mission to Uranus is crucial to understanding not only the planet and magnetosphere, but also its atmosphere, rings and moons,” Jasinski concluded.
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