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The Atlas Coeli covers both hemispheres with 16 charts. The coordinate system is referred to equinox 1950.0 and the scale is 1° = 0.75 cm. There are six charts of the equatorial regions on a rectangular graticule, covering declinations from +25° to -25°; four charts for each hemisphere with straight, converging hour circles and concentric, equally-spaced declination circles covering ...
The raqia or firmament – the visible sky – was a solid inverted bowl over the Earth, coloured blue from the heavenly ocean above it. [36] Rain, snow, wind and hail were kept in storehouses outside the raqia , which had "windows" to allow them in – the waters for Noah's flood entered when the "windows of heaven" were opened. [ 37 ]
A different tradition makes an analogy between the creation of the firmament and the curdling of milk into cheese. Another tradition is that a combination of fire and water makes up the heavens. This is somewhat similar to a view attributed to Anaximander, whereby the firmament is made of a mixture of hot and cold (or fire and moisture). [39]
The concept of seven heavens as developed in ancient Mesopotamia where it took on a symbolic or magical meaning as opposed to a literal one. [4] The concept of a seven-tiered was likely In the Sumerian language, the words for heavens (or sky) and Earth are An and Ki. [5]
Originally a graphic designer, Tirion became a full-time celestial cartographer after the success of his first star atlas, Sky Atlas 2000.0, published in 1981. [1] His second major work, Uranometria 2000.0 , contained over 280,000 stars and 10,000 deep-sky objects across two volumes and was published by Willmann-Bell in 1987.
Pocket Sky Atlas – Roger Sinnott (stars to magnitude 7.5) Deep Sky Reiseatlas – Michael Feiler, Philip Noack (Telrad Finder Charts – stars to magnitude 7.5) Atlas Coeli Skalnate Pleso (Atlas of the Heavens) 1950.0 – Antonín Bečvář (stars to magnitude 7.75 and about 12,000 clusters, galaxies and nebulae)
An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial sky watchers. Sky Map Online – Free interactive star chart (showing over 1.2 million stars up to magnitude 12)
Urania's Mirror; or, a view of the Heavens is a set of 32 astronomical star chart cards, first published in November 1824. [ 1 ] [ 2 ] They are illustrations based on Alexander Jamieson 's A Celestial Atlas , [ 2 ] but the addition of holes punched in them allow them to be held up to a light to see a depiction of the constellation's stars. [ 1 ]