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1 giorno fa · In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...
1 giorno fa · The green and blue comes from infrared wavelengths mapped to visible colors. July 2012: Seven new Y-dwarfs were discovered, making the total number of confirmed Y-dwarfs fourteen. [75] [23] One of the Y dwarfs, called WISE 1828+2650 , was, as of August 2011, the record holder for the coldest brown dwarf—emitting no visible light at all, this type of object resembles a free-floating planet ...
9 ore fa · Tiger. The tiger ( Panthera tigris) is the largest living cat species and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail, and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two ...
1 giorno fa · Polychrome is the "practice of decorating architectural elements, sculpture, etc., in a variety of colors." [1] The term is used to refer to certain styles of architecture, pottery, or sculpture in multiple colors. When looking at artworks and architecture from antiquity and the European Middle Ages, people tend to believe that they were ...
9 ore fa · in Europe (dark grey) Geography Location Northwestern Europe Coordinates Archipelago British Isles Adjacent to Atlantic Ocean Area 84,421 km 2 (32,595 sq mi) Area rank 20th Coastline 7,527 km (4677.1 mi) Highest elevation 1,041 m (3415 ft) Highest point Carrauntoohil Administration Republic of Ireland Largest city Dublin, pop. 1,458,154 Metropolitan Area (2022) United Kingdom Country Northern ...
9 ore fa · A stained-glass panel from Canterbury Cathedral, c. 1175 – c. 1180. It depicts the Parable of the Sower, a biblical narrative. In the history of Europe, the Middle Ages or medieval period (also spelt mediaeval or mediæval) lasted from approximately 500 to 1500 AD, although some prefer other start and end dates. The Middle Ages is the second of the three traditional divisions of Western ...
9 ore fa · Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 states and the Federal District. It is the only country in the Americas to have Portuguese as an official language.
