Scientists just stumbled upon a major intergalactic mystery.

On Monday, September 26, NASA announced it may have spotted water plumes on Jupiter's icy moon, Europa. A team monitoring the Hubble Space Telescope spotted the plumes three times over the course of 15 months.

"The observation increases the possibility that missions to Europa may be able to sample Europa’s ocean without having to drill through miles of ice," NASA wrote in a press release.

Europa has enchanted astronomers due to its thick layers of ice — AND SECRETS.

The 1,900-mile moon is thought to contain twice as much water as all of Earth's oceans, though they're covered in thick layers of ice.

But scientists could send probes into the water plumes and possibly extract samples. 

That could be game-changing for finding life outside Earth.

“Europa’s ocean is considered to be one of the most promising places that could potentially harbor life in the solar system,” Geoff Yoder, acting associate administrator for NASA’s Science Mission Directorate in Washington, said. “These plumes, if they do indeed exist, may provide another way to sample Europa’s subsurface.”

If confirmed, Europa will be the second planet in the universe with water, NASA reports.

In 2005, NASA's Cassini mission found water vapor coming from Saturn's moon Enceladus.

These discoveries seem small, but their implications could be huge — especially for extraterrestrial enthusiasts who want validation that we're not alone in the universe.

(*Raises hand.*)