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In astronomy, a planisphere (/ ˈ p l eɪ. n ɪ ˌ s f ɪər, ˈ p l æ n. ɪ-/) is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot. It can be adjusted to display the visible stars for any time and date.
SkyStar Wheel is a 150-foot tall (45.7 m) 137-foot (41.8 m) diameter traveling observation wheel located in San Francisco's Fisherman's Wharf since November 13, 2023. It has previously operated in San Francisco's Music Concourse (2020–2023), Cincinnati's The Banks (2018–2020), Louisville's Waterfront Park (2018), and Norfolk (2018).
Messier 99 or M99, also known as NGC 4254 or St. Catherine's Wheel, is a grand design spiral galaxy in the northern constellation Coma Berenices approximately 15,000,000 parsecs (49,000,000 light-years) from the Milky Way. [5] It was discovered by Pierre Méchain on 17 March 1781.
In Greek antiquity the ideas of celestial spheres and rings first appeared in the cosmology of Anaximander in the early 6th century BC. [7] In his cosmology both the Sun and Moon are circular open vents in tubular rings of fire enclosed in tubes of condensed air; these rings constitute the rims of rotating chariot-like wheels pivoting on the Earth at their centre.
Messier 36 or M36, also known as NGC 1960 or the Pinwheel Cluster, is an open cluster of stars in the somewhat northern Auriga constellation.It was discovered by Giovanni Batista Hodierna before 1654, who described it as a nebulous patch. [5]
MACS J1149 Lensed Star 1, also known as Icarus, [note 2] is a blue supergiant star observed through a gravitational lens.It is the seventh most distant individual star to have been detected so far (after Earendel, Godzilla, Mothra, Quyllur, star-1 and star-2), at approximately 14 billion light-years from Earth (redshift z=1.49; comoving distance of 14.4 billion light-years; lookback time of 9. ...
Messier 38 or M38, also known as NGC 1912 or Starfish Cluster, [4] is an open cluster of stars in the constellation of Auriga.It was discovered by Giovanni Batista Hodierna before 1654 and independently found by Guillaume Le Gentil in 1749.
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy , the Milky Way .