Monstrous cyclones churn over Jupiter
MR CAPE CANAVERAL: Monstrous cyclones are churning over Jupiter’s poles, until now a largely unexplored region that is more turbulent than scientists expected.
Nasa’s Juno spacecraft spotted the chaotic weather at the top and bottom of Jupiter once it began skimming the cloud tops last year, surprising researchers who assumed the giant gas planet would be relatively boring and uniform down low.
“What we’re finding is anything but that is the truth. It’s very different, very complex,’’ Juno’s chief scientist Scott Bolton of the Southwest Research Institute said Thursday.
With dozens of cyclones hundreds of miles across — alongside unidentifiable weather systems stretching thousands of miles — the poles look nothing like Jupiter’s equatorial region, instantly recognisable by its stripes and Great Red Spot, a raging hurricane-like storm.
“That’s the Jupiter we’ve all known and grown to love,’’ Mr Bolton said.
“And when you look from the pole, it looks totally different ... I don’t think anybody would have guessed this is Jupiter.’’
He calls these first major findings, published on Thursday, “Earth-shattering. Or should I say, Jupiter-shattering.’’
Turning counter-clockwise in t he northern hemisphere just like on Earth, the cyclones are clearly clustered near the poles. The diameters of some of these confirmed cyclones stretch up to 2,800km.
Even bigger, though shapeless weather systems are present in both polar regions. At the same time, the two poles don’t really resemble each other, which is puzzling, according to Bolton.
Scientists are eager to see, over time, whether these super cyclones are stable or dynamic.
“Are they going to stay the same way for years and years like the Great Red Spot? Of course, only time will tell,’’ Bolton said.
Just as intriguing will be how fast these super cyclones are moving.
Launched in 2011 and orbiting Jupiter since last summer, Juno is providing the best views ever of our solar system’s largest planet, peering beneath the clouds for a true portrait.
The spacecraft has made five close passes over Jupiter so far for science collection, the most recent last week; they occur about every two months given Juno’s extremely oblong orbit.
The next one will be in July, with investigators targeting the Great Red Spot.