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c. 300 BC — star catalog of Timocharis of Alexandria; c. 134 BC — Hipparchus makes a detailed star map; c. 150 — Ptolemy completes his Almagest, which contains a catalog of stars, observations of planetary motions, and treatises on geometry and cosmology; c. 705 — Dunhuang Star Chart, a manuscript star chart from the Mogao Caves at Dunhuang
a solar calendar; the planets and the durations of their solar conjunctions; stellar risings and planetary positions for predicting weather and for adjusting the calendar; telling time by length of the gnomon shadow; length of night watches during the year; omens connected with the appearance of stars, planets, MUL.U.RI.RI (comets?), and winds.
A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]
A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
It stands to reason that during the original naming of these months—whenever that happened—they were indeed based on the nakshatras that coincided with them in some manner. The modern Indian national calendar is a solar calendar, much like the Gregorian calendar wherein solstices and equinoxes fall on the same date(s) every year.
Star Maps from Ian Ridpath's Star Tales website. The Mag-7 Star Atlas Project; Historical Celestial Atlases on the Web; Felice Stoppa's ATLAS COELESTIS, an extensive collection of 51 star maps and other astronomy related books stored as a multitude of images. Monthly star maps for every location on Earth Archived 2007-09-13 at the Wayback Machine
On Tuesday, a large planetary alignment involving five planets will streak across our sky. Mercury, Venus, Mars, Jupiter and Uranus will appear to be in a near-straight line, according to Star ...
With the release of Gaia's observations of the star, it has since been refined to a much closer 0.178 light-years (0.055 pc), close enough to significantly disturb objects in the Oort cloud, which extends 1.2 light-years (0.37 pc) from the Sun. [74]