Europa is the sixth moon of Jupiter and has been discovered by Galileo in 1610. It’s extremely possible that at that moment, life has been swimming around in the subsurface ocean Europa almost certainly contains. For those 400 years, it’s entirely possible that extraterrestrial life has been around, but we just have not known it. This is as intriguing a reason as any to go there right now.
The surface of Europa is the smoothest in the complete Solar System, which supports the concept that there’s a water ocean beneath it. There are not many craters but one of note is that the Pwyll crater, whose bright white look again implies the presence of water beneath the surface. When it comes nearer to Jupiter the gravitational pull is raised, which slightly moves the world out, and once it goes farther away in its own orbit, Europa returns to its spherical form. Additionally it is an exceptional example of gravitational energy turning to kinetic energy, which then becomes heat energy.
There have been lots of probes that have visited Mars in the hope of locating present or past life. It’s quite unlikely to harbor any sorts of life now, although its odds of getting played host to germs in the past is still quite good. However, there’s nothing as persuasive as a liquid water ocean to maintain extraterrestrial life in the present moment. As you read this guide, weird and amazing creatures could be swimming across the deathly cold seas of Europa, or parked around some hydrothermal vent (as we see in the ocean depths on our own planet Earth). It’s because of this that we must visit Europa, not over twenty, not over ten, but when possible. A robotic probe could be transmitted within five decades.
A robotic probe would need to carry substantial power on board, maybe by atomic fission. It would need to melt through the good ice crust that’s at least ten kilometres thick, and then release a probe that could swim through the cold oceans and transmit information back to earth.
Unfortunately, a plan known as the Jupiter Icy Moons Orbiter was shelved five decades back, and funding cuts have noticed a string of false starts at the search for life on Europa. If we are to discover extraterrestrial life anytime soon, this needs to change.