About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 25. Chapters: Whirlpool Galaxy, Galactic tide, NGC 1553, Antennae Galaxies, NGC 1275, Interacting galaxy, Andromeda-Milky Way collision, NGC 5195, Messier 60, Holmberg IX, Arp 104, NGC 6240, NGC 2207 and IC 2163, Arp 220, Tidal tail, NGC 4618, Mice Galaxies, NGC 7318, Galaxy merger, NGC 5474, UGC 6945, NGC 4625, NGC 6872 and IC 4970, IC 167, NGC 6745, NGC 520, NGC 1532, NGC 5929, 3C 321, Arp 299, ZW II 96, NGC 7752 and NGC 7753, UGC 9618, NGC 2535, Eyes Galaxies, NGC 2536, NGC 5090 and NGC 5091, NGC 1128, NGC 5930, NGC 1531, Satellite galaxy, NGC 5829, UGC 9561, MCG+04-35-019, NGC 5544, NGC 5820, NGC 4567 and NGC 4568, NGC 5258, NGC 4656 and NGC 4657, NGC 5754, NGC 5545, NGC 5257, NGC 5755, NGC 5614, NGC 4194, NGC 4627, IC 982, NGC 5752, IC 983, NGC 5753, IC 4526, MCG+02-38-020, NGC 5613, Arp 107, NGC 5615, LBG-2377, PGC 214560, MCG+04-35-016, MCG+04-35-017, Arp 272, POX 186, Arp 87, MRC 1138-262, Arp 178, Tidal stripping, Arp 297, Arp 177, Arp 173, Arp 117. Excerpt: The Whirlpool Galaxy (also known as Messier 51a, M51a, or NGC 5194) is an interacting grand-design spiral galaxy that is estimated to be 23 4 million light-years from the Milky Way Galaxy. in the constellation Canes Venatici. It is one of the most famous galaxies in the sky. The galaxy and its companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars. The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understand galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions. Sketch of M51 by Lord Rosse (William Parsons) in 1845.What was later known as the Whirlpool Galaxy was discovered in 1774 by Charles Messier, and is designated as M51. Its companion galaxy, NGC 5195, was discovered in 1781 by Pierre M chain. It was how...