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A star catalogue is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient people, including the Babylonians, Greeks, Chinese, Persians, and Arabs. They were sometimes accompanied by a star chart for illustration. Most modern catalogues are available in electronic format and can be freely downloaded from space agencies' data centres. The largest is being compiled from the spacecraft Gaia and thus far has over a billion stars.
The Gaia hypothesis, also known as the Gaia theory, Gaia paradigm, or the Gaia principle, proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating, complex system that helps to maintain and perpetuate the conditions for life on the planet.
Gaia is a primordial deity and the personification of the Earth in Greek mythology.
Gaia is a space observatory of the European Space Agency (ESA), launched in 2013 and expected to operate until 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and color. The mission aims to construct by far the largest and most precise 3D space catalog ever made, totalling approximately 1 billion astronomical objects, mainly stars, but also planets, comets, asteroids and quasars, among others.
In Greek mythology, Pontus was an ancient, pre-Olympian sea-god, one of the Greek primordial deities. Pontus was Gaia's son and has no father; according to the Greek poet Hesiod, he was born without coupling, though according to Hyginus, Pontus is the son of Aether and Gaia.
Messier 73 is an asterism of four stars in the constellation Aquarius which was long thought to be a small open cluster. It lies several arcminutes east of globular cluster M72. According to Gaia EDR3, the stars are 1030±9, 1249±10, 2170±22, and 2290±24 light-years from the Sun, with the second being a binary star.
Tutto l'amore che c'è is a 2000 film by Italian director Sergio Rubini. It stars Damiano Russo, Michele Venitucci and, in a cameo role, Gérard Depardieu.
The harpē (ἅρπη) is a type of sword- or sickle-like weapon mentioned in Greek and Roman sources, and almost always in mythological contexts.
Hard Grit is a 1998 British rock climbing film directed by Richard Heap and produced by Slackjaw Film, featuring traditional climbing, free soloing, and bouldering on gritstone routes in the Peak District in Northern England. It is considered an important film in the genre and regarded as a historic and iconic film. The film starts with a dramatic fall by French climber Jean–Minh Trinh-Thieu on Gaia at Black Rocks. Hard Grit won ten international film festival awards.
Michele Dancelli is an Italian former road racing cyclist. His main victories include one Milan–San Remo (1970), the 1966 Flèche Wallonne, three editions of the Giro dell'Appennino (1965–1967), two Trofeo Laigueglia. He also won 11 stages in total in the Giro d'Italia and one stage in the 1969 Tour de France.
In Greek mythology, Gaia, also spelled Gaea, is the personification of Earth. Gaia is the ancestral mother—sometimes parthenogenic—of all life. She is the mother of Uranus (Sky), from whose sexual union she bore the Titans, the Cyclopes, and the Giants, as well as of Pontus (Sea), from whose union she bore the primordial sea gods. Her equivalent in the Roman pantheon was Terra.
Italy competed at the 2013 Mediterranean Games in Mersin, Turkey from the 20th to 30 June 2013.
Kepler-69 is a G-type main-sequence star similar to the Sun in the constellation Cygnus, located about 2,390 ly (730 pc) from Earth. On April 18, 2013 it was announced that the star has two planets. Although initial estimates indicated that the terrestrial planet Kepler-69c might be within the star's habitable zone, further analysis showed that the planet very likely is interior to the habitable zone and is far more analogous to Venus than to Earth and thus completely inhospitable.
San Marino has participated in the Junior Eurovision Song Contest three times since its debut in the 2013 contest. The Sammarinese participant broadcaster in the contest is Radiotelevisione della Repubblica di San Marino (SMRTV). Following a nine-year absence after the 2015 contest, SMRTV will return to the contest in 2024.
Michele Mara was an Italian cyclist.
2MASS J15404341−5101357 is a red dwarf of spectral type M7, located in Norma at approximately 17 light-years from Earth. It is the nearest known M7 dwarf.
GJ 1128 is a red dwarf star of spectral type M4.0V, located in constellation Carina 21 light-years away from Earth. It is one of the closer stars to the Sun.
Fimbulthul is a tidal stellar stream torn off from Omega Centauri, the largest globular cluster of our Milky Way galaxy. The stream contains 309 known stars stretching over 18° in the constellations of Hydra and Centaurus, matching the same age as the globular cluster. Omega Centauri is thought to be the nucleus of a dwarf galaxy that merged with the Milky Way.
NGC 770 is an elliptical galaxy in the constellation Aries. It is around 120 million light years from the Milky Way and has a diameter of around 36,000 ly. NGC 770 is gravitationally linked to NGC 772. The galaxy was discovered on November 3, 1855 by RJ Mitchell.
NGC 620 is a spiral galaxy located in the constellation Andromeda about 123 million light-years from the Milky Way. It was discovered by the French astronomer Édouard Stephan in 1871.
References
- ↑ "Michele Gaia". ProCyclingStats. Retrieved 12 October 2015.
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