Celestial cartography

"Astrography" redirects here. For a telescope designed for astrophotography, see astrograph.
Title page of the Coelum Stellatum Christianum by Julius Schiller.

Celestial cartography,[1] uranography[2][3] or star cartography is the fringe of astronomy and branch of cartography concerned with mapping stars, galaxies, and other astronomical objects on the celestial sphere. Measuring the position and light of charted objects requires a variety of instruments and techniques. These techniques have developed from angle measurements with quadrants and the unaided eye, through sextants combined with lenses for light magnification, up to current methods which include computer automated space telescopes. Uranographers have historically produced planetary position tables, star tables and star maps for use by both amateur and professional astronomers. More recently computerized star maps have been compiled, and automated positioning of telescopes is accomplished using databases of stars and other astronomical objects.

Etymology

The word "uranography" derived from the Greek "ουρανογραφια" (Koine Greek ουρανος "sky, heaven" + γραφειν "to write") through the Latin "uranographia". In Renaissance times, Uranographia was used as the book title of various celestial atlases.[4][5][6] During the 19th century, "uranography" was defined as the "description of the heavens". Elijah H. Burritt re-defined it as the "geography of the heavens".[7] The German word for uranography is "Uranographie", the French is "uranographie" and the Italian is "uranografia".

Astrometry

Main article: Astrometry

Star catalogues
Aquarius according to
Hyginus		 Aquarius according to
Johann Bayer's Uranometria,
based on Rudolphine Tables		 Aquarius according to
KStars

A determining fact source for drawing star charts is naturally a star table. This is apparent when comparing the imaginative "star maps" of Poeticon Astronomicon – illustrations beside a narrative text from the antiquity – to the star maps of Johann Bayer, based on precise star-position measurements from the Rudolphine Tables by Tycho Brahe.

Important historical star tables

Star atlases

Naked-eye

Telescopic

Photographic

Modern

Computerized

Free and printable from files

In fiction

The term "stellar cartography" was used in Star Trek: The Next Generation as the name of a department aboard the Starship Enterprise-D. It was also used in Star Trek: Voyager as the name of the department aboard the Starship Voyager. In both cases, the department was a subsection of the ship's science department, and, as the name would suggest, its responsibilities include charting previously uncharted regions of space as the ship passes through them, as well as operating the ship's astrometrics lab(s). In practice, at least on Voyager, this meant that Stellar Cartography was responsible for all sensor data collection and analysis other than for ship operations (navigation, cursory ship/planet scans, transporter operation, etc.) or combat.

See also

References

  1. ↑ Warner, D. J. (1979). The Sky Explored: Celestial Cartography 1500–1800. Amsterdam and New York: Theatrum Orbis Terrarum Ltd. and Alan R. Liss, Inc.
  2. ↑ Lovi, G.; W. Tirion; B. Rappaport (1987). "Uranography Yesterday and Today". Uranometria 2000.0. 1: The Northern Hemisphere to – 6 degree. Willmann-Bell, Richmond.
  3. ↑ Lovi, G.; Tirion, W. (1989). Men, Monsters and the Modern Universe. Richmond: Willmann-Bell.
  4. ↑ 1690: Hevelius J., Firmamentum Sobiescianum sive Uranographia.
  5. ↑ c. 1750: Bevis J., Uranographia Britannica.
  6. ↑ 1801: Bode. J. E., Uranographia sive Astrorum Descriptio.
  7. ↑ Burritt, E. H., The Geography of the Heavens, 1833.
  8. ↑ Dürer’s hemispheres of 1515 — the first European printed star charts
  9. ↑ "Stars & Planets Guide", IanRidpath.com.
  10. ↑ "The Great Atlas of the Sky", GreatSkyAtlas.com, December 1, 2009.
  11. ↑ Stellarmap.com

External links