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Science Quickly

Great Red Spot Helps Explain Jupiter's Warm Upper Atmosphere

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 27 July 2016

⏱️ 3 minutes

🧾️ Download transcript

Summary

A thermal spike linked to the solar system’s largest storm explains weather on gas-giant planets Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

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0:05.8

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0:11.0

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0:19.6

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0:33.5

This is Scientific Americans' 60-second science. I'm Lee Billings. You got a minute?

0:38.8

For most people, Jupiter's most recognizable and mysterious feature is the great red spot.

0:45.4

For centuries, astronomers have watched the storm, spin across the giant world's face.

0:50.5

But for planetary scientists, Jupiter's most distinctive mystery may be what's called the energy

0:55.7

crisis of its upper atmosphere. How do temperatures average about as warm as Earth's, even though

1:01.0

the enormous planet is more than five times further away from the sun? All the sun's giant planets

1:06.8

display this energy crisis, and those in chilly orbits around other stars probably have it too.

1:12.7

So where does the energy to heat their upper atmospheres come from? According to a new study,

1:17.5

the energy must originate within the giants, get transported upward, and become amplified by

1:22.1

turbulent storms. The finding appears in the journal Nature. This offers a new window into Jupiter's depths and should allow researchers to better understand

1:31.2

gas giant atmospheres throughout the universe, and it's all connected to the great red spot.

1:36.7

Astronomers have long known that auroral displays can heat Jupiter's poles, where charged particles

1:42.6

trapped in the planet's intense magnetic fields

1:44.9

slam into its upper atmosphere. Some theorists thought this auroral heating could flow toward the equator

1:51.0

to warm the planet's mid-latitudes. So, using NASA's infrared telescope facility, astronomers

1:56.8

observed Jupiter for nine hours, looking for these flows as thermal fluctuations in the

2:01.2

planet's upper atmosphere, but they saw none. Instead, in Jupiter's middle attitudes, they

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