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New analysis on Voyager 2 photographs of Uranus from 1986 has scientists reconsidering the Uranian system. : NPR

November 17, 2024
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New analysis on Voyager 2 photographs of Uranus from 1986 has scientists reconsidering the Uranian system. : NPR
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A false color view of Uranus made from images taken by Voyager 2 in January 1986.

A false colour view of Uranus constructed from pictures taken by Voyager 2 in January 1986.

AFP/through Getty Pictures


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AFP/through Getty Pictures

Uranus wasn’t prepared for its closeup 38 years in the past.

I communicate of the seventh planet from the Solar, and third largest in our photo voltaic system, which obtained a flyby — 50,000 miles above the planet — from the Voyager 2 spacecraft on January 24, 1986.

Scientists declared that detailed photographs snapped throughout that five-hour move by the planet and its icy moons revealed that Uranus was totally different from different worlds within the outer photo voltaic system. They stated its magnetic area did not maintain any of that scorching, glowing, fuel generally known as plasma.

However a research this week within the journal Nature Astronomy says scientists have now decided that the flyby occurred at a time of a rise in photo voltaic wind exercise that not often happens. This triggered the planet’s magnetosphere to shrink.

“If Voyager 2 had arrived just some days earlier, it will have noticed a totally totally different magnetosphere at Uranus,” says Jamie Jasinski, a physicist at NASA’s Jet Propulsion Laboratory, who was lead writer of the research. “The spacecraft noticed Uranus in situations that solely happen about 4% of the time.”

In different phrases, Uranus was having a foul hair day.

By the way: NPR’s Analysis division says that when the planet was found in 1781, the astronomer William Herschel tried to have it named after King George third. A planet referred to as George might need been just a little simpler to speak about on the radio than one named after that specific Greek god.

Because it handed by the seventh planet, the spacecraft additionally zipped by 10 beforehand undetected Uranian moons, and two Uranian rings. And Voyager 2 remains to be on the market — waaay on the market — in interstellar house.

Dr. William Dunn of College School London says this new dedication that Uranus was beset with photo voltaic exercise throughout Voyager’s temporary flyby, 38 years in the past, provides him contemporary hopes.

“The Uranian system may very well be far more thrilling than beforehand thought,” he told the BBC this week. “There may very well be moons there that would have the situations which might be mandatory for all times, they may have oceans beneath the floor that may very well be teeming with fish!”

The brand new considering may remind us that not solely can we continuously be taught new issues, however the issues we thought we knew for sure can change as we be taught extra. One other Uranus mission could also be launched for a better look within the early 2030s. Within the meantime: perhaps we should not decide a planet — or an individual — in a single look.



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