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Based upon this information, the constellations were catalogued at 125 ± 55 BC. This evidence indicates that the star catalogue of the 2nd-century BC Greek astronomer Hipparchus was used. [12] A Roman era example of a graphical representation of the night sky is the Ptolemaic Egyptian Dendera zodiac, dating from 50 BC.
The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight , starlight , and airglow , depending on location and timing.
The International Astronomical Union (IAU) designates 88 constellations. [1] In the table below, they are listed by geographical visibility according to latitude as seen from Earth, as well as the best months for viewing the constellations at 21:00 (9 p.m.).
The documentary then shifts into Chile's recent past dealing with Pinochet and his dictatorship. Luís Henríquez, a survivor from the Chacabuco concentration camp, describes how a group of about 20, led by a Doctor Alvarez (who was knowledgeable in astronomy), were taught theory during the day and learned how to identify constellations at night.
The following lists of constellations are available: IAU designated constellations – a list of the current, or "modern", constellations; Former constellations – a list of former constellations; Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic
Annotated night sky image showing Auriga and the Pleiades—Capella is the brightest star, towards top left With an average apparent magnitude of +0.08, Capella is the brightest object in the constellation Auriga , the sixth-brightest star in the night sky, the third-brightest in the northern celestial hemisphere (after Arcturus and Vega ), and ...
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Gemini is prominent in the winter skies of the northern Hemisphere and is visible the entire night in December–January. The easiest way to locate the constellation is to find its two brightest stars Castor and Pollux eastward from the familiar V-shaped asterism (the open cluster Hyades ) of Taurus and the three stars of Orion's Belt ( Alnitak ...