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7 godz. temu · In his 1698 book, Cosmotheoros, Christiaan Huygensestimated the distance to Sirius at 27,664 times the distance from the Earth to the Sun(about 0.437 light-year, translating to a parallax of roughly 7.5 arcseconds).[42]
1 dzień temu · If this object were 10 parsecs away from Earth it would appear nearly as bright in the sky as the Sun (apparent magnitude −26.744). This quasar's luminosity is, therefore, about 2 trillion (10 12) times that of the Sun, or about 100 times that of the total light of average large galaxies like our Milky Way.
1 dzień temu · 3.08568 cm – 1 attoparsec 3.4 cm – length of a quail egg[100] 3.5 cm – width of film commonly used in motion pictures and still photography 3.78 cm – amount of distance the Moon moves away from Earth each year[101] 4.3 cm – minimum diameter of a golf ball[102] 5 cm – usual diameter of a chicken egg
1 dzień temu · For both human and robotic exploration, traversing the solar system is a struggle against time and distance. The most distant planets are 4.5–6 billion kilometers from the Sun and to reach them in any reasonable time requires much more capable propulsion systems than conventional chemical rockets.
7 godz. temu · Tristan da Cunha ( / ˌtrɪstən də ˈkuːn ( j) ə / ), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately 2,787 kilometres (1,732 mi) from Cape Town in South Africa, 2,437 kilometres (1,514 mi) from Saint Helena, 3,949 kilometres (2,454 mi) from Mar del Plata [6] in Argentina ...
1 dzień temu · Solar insolation (the amount of solar radiation that reaches Mars) is about 42% of that on Earth, since Mars is about 52% farther from the Sun and insolation falls off as the square of distance.
1 dzień temu · The tiger ( Panthera tigris) is a member of the genus Panthera and the largest living cat species 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 subspecies, mainland Asian tigers and the island tigers of the ...
