By Erik Gregersen
The evening sky is certainly teeming with wonders, from celebrity clusters and nebulae to quasars. Astronomy is the ability through which those and different comparable phenomena are stumbled on and saw. This stellar source lines the trail of recent astronomy, from preliminary efforts to map the heavens to todays use of high-tech telescopes and state-of-the-art units that aid humans delve deeper into celestial discovery.
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Extra resources for Astronomical Observations: Astronomy and the Study of Deep Space (An Explorer's Guide to the Universe)
The stars of Orion illustrate the various derivations: Rigel, from rijl al-Jawzah, “Leg of Orion,” Mintaka, the “Belt,” and Saiph, the “Sword,” all follow the Ptolemaic ﬁgure; Betelgeuse, from yad al-Jawzah, is an alternative nonPtolemaic description meaning “hand of Orion”; and Bellatrix, meaning “Female Warrior,” is either a free Latin translation of an independent Arabic title, an-najid, “the conqueror,” or is a modiﬁcation of an alternative name for Orion himself. Only a handful of names have recent origins— for example, Cor Caroli, the brightest star in Canes Venatici, named in 1725 by Edmond Halley.
Its rectilinear constellation boundaries preserve the traditional arrangements of the naked-eye stars. The smallest of the constellations, Equuleus (“the Little Horse”) and Crux (“the [Southern] Cross”), nestle against constellations that are more than 10 times larger, Pegasus and Centaurus, respectively. The standard boundaries deﬁne an unambiguous constellation for each star. ) The Decans and Lunar Mansions Two other astronomical reference systems developed independently in early antiquity, the Egyptian decans and the lunar mansions.
In the 1980s improvements in astronomical technology led to the Second Palomar Observatory Sky Survey (POSS II). Atlases for Stargazing Three modern atlases have gained special popularity among amateur and professional observers alike. Norton’s Star Atlas, perfected through numerous editions, plots all naked-eye stars on eight convenient charts measuring 25 by 43 cm (10 by 17 inches). 0 (1981) includes some 43,000 stars to magnitude eight and is based primarily on the SAO Star Catalog. 5 by 13 inches), include bright star names, boundaries of the Milky Way, and about 2,500 star clusters, nebulas, and galaxies.
Astronomical Observations: Astronomy and the Study of Deep Space (An Explorer's Guide to the Universe) by Erik Gregersen