SATURN IS OFFICIALLY LOSING ITS RINGS AND SHOCKINGLY AT MUCH FASTER RATE THAN EXPECTED Advertisement - Physics-Astronomy.org

SATURN IS OFFICIALLY LOSING ITS RINGS AND SHOCKINGLY AT MUCH FASTER RATE THAN EXPECTED Advertisement



If you were to pick Saturn out of a lineup you'd probably recognize it by its iconic rings. They're 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 won't always look this way. Because its rings are disappearing.

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



That's right, Saturn is losing its rings! And fast. Much faster, even, than scientists had first thought. Right now, it's 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 Saturn's rings. Saturn's 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 Saturn's magnetic field; ultimately, falling toward Saturn, where they burn up in the atmosphere. Now, we've known about ring rain since the 1980s when NASA's Voyager mission first noticed mysterious, dark bands that turned out to be ring rain caught in Saturn's magnetic fields. Back then, researchers estimated the rings would totally drain in 300 million years.





But observations by NASA's 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 Saturn's 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, it's 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. That's younger than some dinosaurs. So when you think about it, we're 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 Saturn's moon Enceladus, it uncovered a trail of ice and gas leading back to Saturn's E ring. Enceladus is the whitest, most reflective moon in our solar system 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 moon's surface, creating a blinding white frost. So, who knows what other discoveries might be hiding within the rings? At the very least, it's clear we'd better keep looking while we still can.

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