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According to legend, Alexander the Great came to visit the philosopher Diogenes of Sinope. Alexander wanted to fulfill a wish for Diogenes and asked him what he desired. [5] As told by Diogenes Laërtius, Diogenes replied, "Stand out of my light." [6] Plutarch provides a longer version of the story, which begins after Alexander arrives in Corinth:
The Sun is a G-type main-sequence starthat makes up about 99.86% of the mass of the Solar System.[26] It has an absolute magnitudeof +4.83, estimated to be brighter than about 85% of the stars in the Milky Way, most of which are red dwarfs. [27][28]It is more massive than 95% of nearby stars within 7 pc.
Kepler was born on 27 December 1571, in the Free Imperial City of Weil der Stadt (now part of the Stuttgart Region in the German state of Baden-Württemberg). His grandfather, Sebald Kepler, had been Lord Mayor of the city. By the time Johannes was born, the Kepler family fortune was in decline. His father, Heinrich Kepler, earned a precarious ...
At the same temperature, electrons, due to their much smaller mass, reach escape velocity and build up an electric field that further accelerates ions away from the Sun. [31] The total number of particles carried away from the Sun by the solar wind is about 1.3 × 10 36 per second. [32]
Copernican heliocentrism is the astronomical model developed by Nicolaus Copernicus and published in 1543. This model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds. The Copernican model displaced the geocentric ...
Solar power, also known as solar electricity, is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Solar panels use the photovoltaic effect to convert light into an electric current. [63]
Taken on 20 October 1968 from Apollo 7. Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon.
The sun rises over the circular mound of creation as goddesses pour out the primeval waters around it Nun lifts the solar barque with the new-born sun from the waters of creation. The Egyptian conception of the universe centered on Ma'at, a word that encompasses several concepts in English, including "truth", "justice", and "order". It was the ...