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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.
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.
Stargazing apps are brilliant for spotting constellations in the night sky, looking at the planets, identifying stars, and learning about astronomy. Here Are 18 Best Stargazing Apps for Spotting ...
Orion's two brightest stars, Rigel (β) and Betelgeuse (α), are both among the brightest stars in the night sky; both are supergiants and slightly variable. There are a further six stars brighter than magnitude 3.0, including three making the short straight line of the Orion's Belt asterism .
The depictions of the constellations in Urania's Mirror are redrawings from those in Alexander Jamieson's A Celestial Atlas, published about three years earlier, and include unique attributes differing from Jamieson's sky atlas, including the new constellation of Noctua the owl, and Norma Nilotica – a measuring device for the Nile floods – held by Aquarius the water bearer.
Winter constellations as seen from the tropics Flip book (158 images): Transit of Mars, Sun, Mercury, and Venus in 2017 The Winter Hexagon is an asterism appearing to be in the form of a hexagon with vertices at Rigel , Aldebaran , Capella , Pollux , Procyon , and Sirius .
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