Astronomy: Essential Facts About the Universe

Is there life outside the Earth? What is a black hole? How much did the Apollo spacecraft weigh? This compact guide is built around exactly these kinds of questions, presenting essential facts about the solar system, galaxies in deep space, manned space flights, space stations and probes. It's part of a series that takes one subject at a time and gathers together fascinating, sometimes little-known facts alongside answers to the questions people most often ask.