About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 102. Chapters: 23 Ursae Majoris, 36 Ursae Majoris, 3C 244.1, 41 Lyncis, 41 Lyncis b, 47 Ursae Majoris, 47 Ursae Majoris b, 47 Ursae Majoris c, 47 Ursae Majoris d, 4 Ursae Majoris b, 61 Ursae Majoris, Alcor B, Alpha Ursae Majoris, AN Ursae Majoris, Arp 299, Beta Ursae Majoris, Big Dipper, Chi Ursae Majoris, Delaware Diamond, Delta Ursae Majoris, Epsilon Ursae Majoris, Extended Groth Strip, Feige 55, Gamma Ursae Majoris, Gliese 412, Gliese 532, Groombridge 1618, Groombridge 1830, G 196-3, HAT-P-13, HAT-P-13b, HAT-P-13c, HAT-P-3, HAT-P-3b, HD 118203, HD 118203 b, HD 68988, HD 68988 b, HD 68988 c, HD 80606 b, HD 89744, HD 89744 b, HD 98618, Horse and Rider, HR 5256, Hubble Deep Field, Iota Ursae Majoris, Kappa Ursae Majoris, Lalande 21185, Lambda Ursae Majoris, List of stars in Ursa Major, Lockman Hole, M101 Group, M109 Group, Markarian 421, Mayall's Object, Messier 108, Messier 109, Messier 81, Messier 82, Mizar and Alcor, Muscida, Mu Ursae Majoris, NGC 2787, NGC 2841, NGC 2976, NGC 3077, NGC 3079, NGC 3184, NGC 3310, NGC 3669, NGC 3877, NGC 3938, NGC 3949, NGC 3953, NGC 3982, NGC 4013, NGC 4051, NGC 4088, NGC 4194, NGC 4605, NGC 5034, NGC 5144, NGC 5164, NGC 5474, Nu Ursae Majoris, Omega Ursae Majoris, Omicron Ursae Majoris, Owl Nebula, Palomar 4, PGC 36839, Phi Ursae Majoris, Pi2 Ursae Majoris, Pinwheel Galaxy, Pioneer Star, Pi Ursae Majoris, Psi Ursae Majoris, Q0906+6930, Rho Ursae Majoris, Sidus Ludoviciana, Sigma1 Ursae Majoris, Sigma2 Ursae Majoris, Sigma Ursae Majoris, SN 1998S, Struve 1341, Tau Ursae Majoris, Theta Ursae Majoris, The Indestructibles, Twin Quasar, Upsilon Ursae Majoris, Ursa Major Cluster, Ursa Major II Dwarf, Ursa Major I Dwarf, Ursa Major Moving Group, Winnecke 4, WISEPA J085716.25+560407.6, WISEPA J090649.36+473538.6, WISEPA J101905.63+652954.2, WISEPC J115013.88+630240.7, WISEPC J132004.16+603426.2, WISE 1405+5534, W Ursae Majoris, Xi Ursae Majoris. Excerpt: This is the list of notable stars in the constellation Ursa Major, sorted by decreasing brightness. The Hubble Deep FieldThe Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995. The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 800 citations by the end of 2008. Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a total of eleven days of observations. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, until the Hubble Extreme Deep Field (XDF) was released in 2012. The dramatic improvement in Hubble's imaging capabilities after corrective optics were installed...
