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Hace 1 día · In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
Hace 1 día · 1st century AD: The aeolipile, a simple steam turbine is recorded by Hero of Alexandria. [263] 1st century AD: The first use of respiratory protective equipment is documented by Pliny the Elder ( c. 23 AD –79) using animal bladder skins to protect workers in Roman mines from red lead oxide dust.
Hace 4 días · The Umayyads continued the Muslim conquests, conquering Ifriqiya, Transoxiana, Sind, the Maghreb and Hispania ( al-Andalus ). At its greatest extent, the Umayyad Caliphate covered 11,100,000 km 2 (4,300,000 sq mi), [1] making it one of the largest empires in history in terms of area. The dynasty was toppled by the Abbasids in 750.
Hace 1 día · Russia,[b]or the Russian Federation,[c]is a country spanning Eastern Europeand North Asia. It is the largest country in the world by area, extending across eleven time zonesand sharing land borders with fourteen countries. [d]It is the world's ninth-most populous countryand Europe's most populous country. Russia is a highly urbanized country ...
Hace 3 días · History Origin. The family stems from the Lords of Seinsheim, who had established themselves in Franconia during the Middle Ages. A branch of the Seinsheim family (the non-Schwarzenberg portion died out in 1958) was created when Erkinger of Seinsheim acquired the Franconian territory of Schwarzenberg and the castle of Schwarzenberg in Scheinfeld during the early part of the 15th century.
Hace 3 días · Bad Bunny discography. Puerto Rican rapper Bad Bunny has released five studio albums, one mixtape, one extended play, one compilation album, ninety-five singles as a lead artist and thirty-two singles as a featured artist. His first studio album X 100pre was released on Christmas Eve, 2018.
Hace 2 días · James VI and I (1566–1625), King of Scots and of England and Ireland. Christine James (born 1954), Welsh poet and academic. Clive James (1939–2019), Australian author, poet and memoirist. Ernst Jandl (1925–2000), Austrian writer, poet and translator. Klemens Janicki (1516–1543), Polish poet in Latin.
