NASA Cassini mission's final moments reveal the reason why Saturn's upper atmosphere is so hot

Before it met its doom, the spacecraft gathered data that puts to rest a long-standing mystery about the sixth planet from our Sun.

Saturn's Weird Hexagonal Vortex Just Got Even Weirder, Thanks to Cassini

NASA's Cassini Captures Eerie Sounds During Its Saturn Mission

Picture of Saturn's Bands and Moons  Perfectly Capture Cassini's Legacy

The Sole Survivor of the Cassini Mission Is Still Lost in Space

Cassini Data Reveals New Mystery About Saturn's Moon Titan

Newly Released Cassini Image Shows Why Saturn is Clearly The Best Planet

Cassini Found Tons of "Kittens" Hiding In Saturn's Rings

Cassini's Last View of Saturn and Its Rings Will Make You Emotional

Goodnight, sweet prince.

What NASA's Website Looked Like When Cassini Began its Journey

The satellite carried 1997-era tech all the way to Saturn.

How to Watch NASA's Cassini Plunge into Saturn, Ending its Journey

And what a journey it's been.

Vintage Neil deGrasse Tyson Shuts Down Matt Lauer's Cassini Doubt

He justified the $3.3 billion price tag breezily while rocking a planetary tie.

Three Human Cassinis Weigh in on the Spacecraft's Final Plunge

"I'm literally named after the same man as the spacecraft."

5 of Cassini's Most Important Achievements

Cassini Will Plunge Into Saturn and Die for Three Hours on Friday

This Beautiful Photo of Saturn and Earth Will be Cassini's Legacy

Remembering 'The Day the Earth Smiled.'

Saturn's Rings Look like a Gene Davis Painting in New Cassini Images

5 Surprises Cassini Revealed About Saturn and Its Moons

It's time to reflect on Cassini's legacy.

5 Stunning Visuals That Explain Cassini's Final Days

Cassini will not go gentle into that gas giant.

The 5 Next Steps for Space Exploration After Cassini

Cassini is dead. Long live Cassini.

Cassini Spends Its Final Days Hunting for Tiny Moons in Saturn's Rings

So far, the moons have eluded scientists.

Watch Cassini Plunge Toward Saturn in This Astonishing NASA Video

Cassini Finds Saturn's Ring Gap Truly is Empty

Cassini Returns a Champion From Its Most Daring Mission Yet

The Cassini Spacecraft Google Doodle Celebrates the Doomed Probe

Cassini Reveals Saturn's Deepest Secrets

The space probe's mission will come to an end on September 15, 2017.

NASA Imagines What Cassini's Noble Death Will Look Like

NASA Reveals Cassini's Grand Finale Tour Around Saturn

Saturn's Moon Looks Like a Piece of Weird Space Ravioli in New Photos

Saturn's Moon Tethys Looks Like a Space Eyeball in this New Photo