About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 79. Chapters: Constellation, Interstellar medium, Astronomical symbols, Outer space, Theoretical astronomy, Cosmic dust, Asterism, Searching for the first X-ray source per constellation, Astronomical visual source, Astronomical X-ray sources, Extrasolar X-ray source astrometry, Astronomical gamma-ray source, Stellar magnetic field, Astronomical object, Astronomical source, First X-ray source in Cancer, Rogue planet, Centaurus XR-2, Extraterrestrial materials, Abell 2147, Serpens Caput X-1, Cygnus Superbubble, VIRGOHI21, Deep sky object, Orion-Eridanus Superbubble, Centaurus XR-3, Kodaira 1, Interplanetary dust cloud, Hot intergalactic medium, Centaurus X-2, Differential rotation, Interplanetary medium, Cygnus XR-2, Sagittarius XR-6, Cygnus XR-3, Cygnus X-2, SCP 06F6, Abell 2256, Cygnus XR-4, Centaurus X-4, Norma XR-2, Sagittarius XR-5, Hydra A, List of Herbig-Bell emission-line stars, Hot companion, Intracluster medium, Herbig-Bell catalog, Sagittarius X-5, Substellar object, Lists of astronomical objects, Himiko, Stellar-wind bubble, Damped Lyman-alpha system, Glass with embedded metal and sulfides, Magellanic Bridge, CFHQS J2329-0301. Excerpt: Astronomical symbols are symbols used to represent various celestial objects, theoretical constructs and observational events in astronomy. The earliest forms of these symbols appear in Greek papyri of late antiquity. The Byzantine codices in which the Greek papyri were preserved continued and extended the inventory of astronomical symbols. New symbols were further invented to represent many just-discovered planets and minor planets discovered in the 18th-20th centuries. These symbols were once commonly used by professional astronomers, amateur astronomers, and astrologers. While astronomical symbols are still used in almanacs and astrological publications, they have fallen into disuse in...
