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An approximation of the AuthaGraph projection. AuthaGraph is an approximately equal-area world map projection invented by Japanese architect Hajime Narukawa [1] in 1999. [2] The map is made by equally dividing a spherical surface into 96 triangles, transferring it to a tetrahedron while maintaining area proportions, and unfolding it in the form of a rectangle: it is a polyhedral map projection.
The Dymaxion map projection, also called the Fuller projection, is a kind of polyhedral map projection of the Earth's surface onto the unfolded net of an icosahedron. The resulting map is heavily interrupted in order to reduce shape and size distortion compared to other world maps , but the interruptions are chosen to lie in the ocean.
The Center for Astrophysics (CfA) Redshift Survey was the first attempt to map the large-scale structure of the universe.. The first survey began in 1977 with the objective of calculating the velocities of the brighter galaxies in the nearby universe by measuring their redshifts at the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts.
Gaia is a space observatory of the European Space Agency (ESA) that was launched in 2013 and was operated for data collection until January 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, [5] [6] and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent ...
The ancient Hebrews, like all the ancient peoples of the Near East, believed the sky was a solid dome with the Sun, Moon, planets and stars embedded in it. [4] In biblical cosmology, the firmament is the vast solid dome created by God during his creation of the world to divide the primal sea into upper and lower portions so that the dry land could appear.
The first four planets are relatively close to one another, but the next four require a certain amount of hiking in order to visit them. [25] A census of all permanent human orreries has been initiated by the French group F-HOU with a new effort to study their impact for education in schools. [26] A map of known human orreries is available. [27]
The dimensions are 2 × 0.7 × 0.7 mm (0.98 mm 3 or 6.0 × 10 −5 in 3). The asteroid 36614 Saltis is located at Saltsjöbaden 's Kunskapsskola, a school near the Stockholm Observatory . The asteroid was discovered by A. Brandeker in 2000, using a telescope at the observatory, and the body was named after the observatory's location, Saltsjöbaden.
The Digital Universe Atlas has spun off a commercial-grade planetarium platform from SCISS called Uniview that was featured in the White House star party on October 7, 2009. The Atlas database and Partiview interface is compatible with professional planetarium software such as Evans & Sutherland's Digistar and Sky-Skan's DigitalSky 2.