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Saturn is officially losing its rings — and they're disappearing much faster than scientists had anticipated

  • Saturn is losing its rings.
  • New data from NASA's former Cassini spacecraft has revealed that the rings will be gone 200 million years sooner than previously estimated.
  • We explain what's going on with Saturn's rings and why they're disappearing at a faster rate than previously thought.

If you were to pick Saturn out of a lineup youd probably recognize it by its iconic rings. Theyre the biggest, brightest rings in our solar system. Extending over 280,000 km from the planet; wide enough to fit 6 Earths in a row. But Saturn wont always look this way. Because its rings are disappearing.

Thats right, Saturn is losing its rings! And fast. Much faster, even, than scientists had first thought. Right now, its raining 10,000 kilograms of ring rain on Saturn per second. Fast enough to fill an Olympic-sized pool in half an hour.

This rain is actually the disintegrated remains of Saturns rings. Saturns rings are mostly made up of chunks of ice and rock. Which are under constant bombardment: Some by UV radiation from the Sun and others by tiny meteoroids.

When these collisions take place, the icy particles vaporize, forming charged water molecules that interact with Saturns magnetic field; ultimately, falling toward Saturn, where they burn up in the atmosphere.

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Now, weve known about ring rain since the 1980s when NASAs Voyager mission first noticed mysterious, dark bands that turned out to be ring rain caught in Saturns magnetic fields. Back then, researchers estimated the rings would totally drain in 300 million years. But observations by NASAs former Cassini spacecraft give a darker prognosis. Before its death dive into Saturn in 2017, Cassini managed to get a better look at the amount of ring-dust raining on Saturns equator.

And discovered that it was raining heavier than previously thought. With these clearer observations, scientists calculated the rings had only 100 million years left to live. Now, its tough to imagine a ringless Saturn.

But for much of its existence, the planet was as naked as Earth. While Saturn first formed around 4.5 BILLION years ago, studies suggest the rings are only 100- 200 million years old, tops. Thats younger than some dinosaurs.

So when you think about it, were pretty lucky we happened to be around to see those magnificent rings. Really lucky, in fact. Because efforts to study those rings have led us to other discoveries.

For example, as Cassini explored Saturns moon Enceladus, it uncovered a trail of ice and gas leading back to Saturns E ring. Enceladus is the whitest, most reflective moon in our solar system.

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And by studying the ring more closely, scientists now know why. Turns out, the moon is constantly gushing out gas and dust.

Some of it ends up in space and in the E ring while the rest snows back onto the moons surface, creating a blinding white frost.

So, who knows what other discoveries might be hiding within the rings? At the very least, its clear wed better keep looking while we still can.

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