Diving on Europa? Here's How We Could Penetrate That Ice

Europa is an ice-covered moon orbiting Jupiter that likely an ocean underneath. Perhaps that ocean contains life. Perhaps it doesn’t. But we’re not going to know for sure until we send a probe there to check things out.

NASA announced last week that it’s one step closer to flying by Europa dozens of times after launching in the 2020s. The mission concept was approved and funding is ongoing. To get under that ice (virtually) NASA could include a radar instrument called REASON (Radar for Europa Assessment and Sounding: Ocean to Near-surfaces) to peer underneath. But what if we were to eventually send a robotic landing mission?

Britney Schmitt, a member of the Europa mission team, told a conference last week that her team in Antarctica is testing out the very techniques that could be used in the ice, hundreds of millions of kilometers away.

“Europa may seem alien to you and I, but if you go the Earth’s poles, it doesn’t seem as far-fetched,” said Schmidt, who is an assistant professor at the Georgia Institute of Technology’s Earth and atmospheric sciences department.

At McMurdo Station in Antarctica last year, a mini-machine called Icefin dove under the ice to check out what’s sitting underneath the shelf. That was no small feat, given that the ice is tens of meters thick. The resulting video shows what’s lurking on the seafloor. Even to Earth-accustomed eyes, it looks kind of alien.

Icefin (Schmidt is principal investigator) is powerful, but small enough that it can be carried by people. The tethered underwater vehicle even breaks down into pieces to make it easier to transport. The instruments on board are supposed to measure things such as the ice, what’s in layers of water and what’s living on the seafloor. It can dive as deep as 1,500 meters (4,921 feet) and is designed to travel at least three kilometers (1.86 miles) underwater.

And if you think that’s amazing, check out what’s swimming in the waters this summer: Artemis, a more powerful underwater vehicle that can travel up to 15 kilometers (9.3 miles). The goal is not only to test out technologies for Europa, but to better understand the fragile environment of Antarctica and how best to protect it.

Schmidt characterized the work, which is led by Georgia Tech, as key to helping with NASA’s proposed Europa mission. “Personally, I’m proud to be a part of the mission team. I’ve helped on studies for a while, and it’s just been a large group of people working for the past 20 years to get this mission going,” she said.

Read more at Discovery News