
In 2017, scientists spotted our solar system's first confirmed interstellar visitor: 'Oumuamua. While not an alien spacecraft, 'Oumuamua was an interstellar object (ISO), which came from another planetary system far, far away — and traveled at the blazingly fast speed of 196,000 miles per hour (315,431 kilometers per hour).
To prepare for future visitors, Hiroyasu Tsukamota, a professor at the University of Illinois Urbana-Champaign, has developed a deep-learning-based guidance and control framework called Neural-Rendezvous that could allow spacecraft to safely encounter ISOs.