“For the first time in human history, we can do more than just gaze at the stars,” declared philanthropist and high-tech entrepreneur Yuri Milner on April 12. “We can actually reach them.” Milner, a Russian native, was named after cosmonaut Yuri Gagarin, who exactly 55 years earlier became the first man in space and the first to orbit Earth. Milner was hoping to bring another historic first to fruition. At a press conference held atop New York City’s One World Tr...