Photos: Atlas 5 rocket aims for International Space Station

Russia sent a spy satellite into orbit aboard a Soyuz rocket Feb. 2 from a snowy launch pad at the Plesetsk Cosmodrome, setting off on a mission to detect, locate, and characterize foreign military radio signals.

President Trump called the International Space Station Monday for a videochat watched by thousands of school kids, congratulating commander Peggy Whitson on becoming America’s most experienced astronaut and jokingly promising to get Americans to Mars “during my first term or, at worst, during my second term.”

The year ended with a deluge of big news, reminding us of the risks of spaceflight and the thin margins between success and failure on the final frontier. 2014 was also a year of breakthroughs in the exploration of the solar system and the future of human spaceflight.