Know the name but not the position? No problem, these indexes make it a snap to find. Optional Acetate overlays, including field-of-view and Telrad finder scales.. How may stars are in that cluster? What is the opacity of that dark nebula?
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Know the name but not the position? No problem, these indexes make it a snap to find. Optional Acetate overlays, including field-of-view and Telrad finder scales.. How may stars are in that cluster? What is the opacity of that dark nebula? Is that bright nebula emision or reflective? Uranometria Serious observers know that the more they know about an object the better their observing experience. An atlas can give you postion, relative size and possibly a rough idea of its shape but that might not be enough to locate it.
Take galaxies for example. A galaxy might be quite large but you could have difficulty in locating it if its surface brightness is really dim. Or perhaps is is edge-on— even bright ones like this are sometimes hard to find. This data is provided for each map and by object type, and is fully indexed more than 30, entries. This volume is a must-have for the serious observer. The below two-page spread shows the data that matches Map 94 shown above. Where did the name Uranometria come from?
To the ancient Greeks, Urania was the Muse of the Heavens, and uranos was the word for the sky. In , when Johann Bayer published his epochal atlas he named it Uranometria , and it became to celestial mapmaking what the Gutenberg Bible was to printing.
For its era, Uranometria set an unprecedented and highly-advanced scientific, graphic and artistic standard for star charts. Nearly years later, in we published to universal world acclaim Uranometria During the s we began the process that has culminated in a greatly expanded second edition. Telescopes were getting bigger, amateurs were imaging the sky with super-sensitive CCD cameras, and a new deep-sky atlas was needed.
The data upon which to build this atlas had to be better than anything on the shelf. Emil Bonanno created software to allow us to visually inspect the position, size and orientation of deep sky objects against the Digitized Sky Survey and where necessary, correct and flawlessly record the data.
Even though Cragin started with the very best professional data available literally tens of thousands of corrections, large and small, were made. Never before has a large-scale atlas been based on such accurate data. Next, Will Remaklus and Wil Tirion took that data and created superb maps of unsurpassed accuracy and beauty. The result is that when you point your telescope to an Uranometria No other large-scale atlas has this attention to detail, nor anywhere near as many objects—by a factor of 3!
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The first 48 charts illustrate each of the 48 Ptolemaic constellations. The 49th chart introduces 12 new constellations in the deep southern sky which were unknown to Ptolemy. The positions used by Bayer to create the Uranometria were taken from the expanded 1, star catalog of Tycho Brahe. Bayer took the southern star positions and constellation names for the 49th plate from the catalog of Dutch navigator Pieter Dirkszoon Keyser , who corrected the older observations of Amerigo Vespucci and Andrea Corsali , as well as the report of Pedro de Medina.