The Hubble telescope has discovered a ‘Dark vortex’ raging on Neptune that would swallow 20% of Earth’s surface

• NASA and Europe’s Hubble space telescope keeps an eye on distant planets, watching for changes in their weather.
• Hubble has discovered a new and mysterious “dark tempest” on Neptune that’s 6,800 miles across.
• The space observatory also got a fresh look at a “giant polar cap” storm on Uranus that is swirling around the planet’s North Pole.

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