Containing 2400 entries, this dictionary encompasses all aspects of classical and modern astronomy and gives the names of constellations, stars, galaxies, asteroids, comets, nebulae and observatories. Exact definitions of terms used in astrophysics and cosmology allow access to the most up-to-date research. A wide range of phenomena, from blazars and black holes to runaway stars and the Hawking effect, are carefully explained.
This is really a reference book, so I only claim to have read parts of it. I bought it years ago in CA while attending a friend's wedding. It's become useful from time to time over the years and doesn't yet feel too out of date.