https://apnews.com/089bd0826e30c7fe24320cf9974c9c14 > CHICAGO (AP) — Eugene Parker, a physicist who theorized the existence of solar wind and became the first person to witness the launch of a spacecraft bearing his name, has died, his son and the University of Chicago said Wednesday. > His son, Eric Parker, said Eugene Parker died peacefully at a retirement community in Chicago on Tuesday, about a decade after being diagnosed with Parkinson's disease. He was 94.