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University of Piraeus (UniPi; Greek: Πανεπιστήμιο Πειραιώς, abbr. ΠαΠει) is a Greek public university located in Piraeus, Athens, Greece with a total of ten academic departments focused mainly on Business Management, Computer science, Economics, Finance and Maritime Studies.
Aristarchus's 3rd century BCE calculations on the relative sizes of, from left, the Sun, Earth and Moon, from a 10th-century CE Greek copy. On the Sizes and Distances (of the Sun and Moon) (Ancient Greek: Περὶ μεγεθῶν καὶ ἀποστημάτων [ἡλίου καὶ σελήνης], romanized: Perì megethôn kaì apostēmátōn [hēlíou kaì selḗnēs]) is widely accepted ...
Aristarchus of Samos (/ ˌ æ r ə ˈ s t ɑːr k ə s /; Ancient Greek: Ἀρίσταρχος ὁ Σάμιος, Aristarkhos ho Samios; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center of the universe, with the Earth revolving around the Sun once a year and rotating about its axis once a day.
On the Sizes and Distances (Aristarchus), by Aristarchus of Samos (c. 310 – c. 230 BC) On Sizes and Distances (Hipparchus) , by Hipparchus ( c. 190 – c. 120 BC ) Topics referred to by the same term
Aristarchus of Samos (/ ˌ æ r ə ˈ s t ɑːr k ə s /; Ἀρίσταρχος, Aristarkhos; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it (see Solar System).
Aristarchus is a lunar impact crater that lies in the northwest part of the Moon's near side. It is considered the brightest of the large formations on the lunar surface, with an albedo nearly double that of most lunar features.
Aristarchus the Chronographer, author of a letter on the situation of Athens, and the events which took place there in the 1st century AD, and especially of the life of Dionysius the Areopagite Aristarchus of Alexandria (date unknown), the author of a work on the interpretation of dreams, mentioned by Artemidorus in the 2nd century
Aristarchus's inequality (after the Greek astronomer and mathematician Aristarchus of Samos; c. 310 – c. 230 BCE) is a law of trigonometry which states that if α and β are acute angles (i.e. between 0 and a right angle) and β < α then