A handy and comprehensive reference to the 300 most interesting celestial objects. This book provides a tour through the galaxy, from its solar core to its outer limits, with all the highlights and the very latest data about the universe. Convenient data sidebars with each entry provide facts and figures on every object- including mass, magnitude, density, radius, rotation period, and surface and core temperatures. An annotated cross-section of the object enhances this information, and a full-page photograph brings the object to life. Additional spreads bring together and explain related objects or phenomena. For example, the corresponding pages for the sun include solar power, sunspots and solar flares. Others examples include: Mercury: Mercury's surface The asteroid belt: Eros 433 Jupiter's moons: 10, Europa, Callista Uranus: Uranus' rings, Ariel and Titania Outer belts and comets: Halley's comet; Deep Impact Space telescopes: International Space Station. 300 Astronomical Objects is a handy reference for the amateur astronomer.