Home/Tag: astronomy

Mysterium Cosmographicum: Johannes Kepler’s First Major Work

By |2020-09-07T01:41:31+03:00September 7th, 2020|Categories: Knowledge|Tags: , , , , , , , |

Mysterium Cosmographicum is an astronomy book by the German astronomer Johannes Kepler, published at Tübingen in 1597 and in a second edition in 1621. Kepler proposed that the distance relationships between the six planets known at that time could be understood in terms of the [...]

The Copernican Principle

By |2020-08-13T15:11:14+03:00August 13th, 2020|Categories: Knowledge|Tags: , , , , , , , |

In physical cosmology, the Copernican principle states that humans, on the Earth or in the Solar System, are not privileged observers of the universe. Named for Copernican heliocentrism, it is a working assumption that arises from a modified cosmological extension of Copernicus's argument of a [...]

Celestial Spheres – History and Visual Expressions

By |2020-04-13T12:11:02+03:00April 13th, 2020|Categories: Culture, Knowledge|Tags: , , , , , , , , , |

The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus, and others. In these celestial models, the apparent motions of the fixed stars and planets are accounted for by treating them as embedded in [...]

The Book of Healing

By |2020-03-20T00:48:08+03:00March 20th, 2020|Categories: Culture|Tags: , , , , , , , , , , , , |

The Book of Healing is a scientific and philosophical encyclopedia written by Abu Ali ibn Sina from medieval Persia, near Bukhara in Maverounnahr. Also called The Cure it is intended to "cure" or "heal" ignorance of the soul. Despite its title, it is not concerned with [...]

The History of Halley’s Comet

By |2020-03-16T17:12:13+03:00March 15th, 2020|Categories: Knowledge|Tags: , , , , , , , , |

Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in [...]

Arcturus – One of the Brightest Stars in the Night Sky

By |2020-02-15T02:33:51+03:00February 15th, 2020|Categories: Culture, Knowledge|Tags: , , , , |

Arcturus is the brightest star in the constellation of Boötes, the fourth-brightest in the night sky, and the brightest in the northern celestial hemisphere. Together with Spica and Denebola (or Regulus, depending on the source), Arcturus is part of the Spring Triangle asterism and, by [...]

Ophiuchus Constellation Location, History, and Mythology

By |2019-12-09T01:14:46+03:00December 9th, 2019|Categories: Culture, Knowledge|Tags: , , , , , , |

Ophiuchus is a large constellation straddling the celestial equator. Its name is from the Greek Ophioukhos; "serpent-bearer", and it is commonly represented as a man grasping a snake. The serpent is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by [...]

Canopus: The Second-Brightest Star in the Night Sky

By |2019-11-28T01:56:26+03:00November 28th, 2019|Categories: Culture, Knowledge|Tags: , , , , , |

Canopus is the brightest star in the southern constellation of Carina and is located near the western edge of the constellation around 310 light-years from the Sun. Its proper name is generally considered to originate from the mythological Canopus, who was a navigator for Menelaus, [...]