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5 godz. temu · Satellite image of the reactor and surrounding area in April 2009. The Chernobyl Nuclear Power Plant Zone of Alienation [a] is an officially designated exclusion zone around the site of the Chernobyl nuclear reactor disaster. [5] : p.4–5 : p.49f.3 It is also commonly known as the Chernobyl Exclusion Zone, the 30-Kilometre Zone, or simply The ...
1 dzień temu · The Curzon Line was a proposed demarcation line between the Second Polish Republic and the Soviet Union, two new states emerging after World War I.Based on a suggestion by Herbert James Paton, it was first proposed in 1919 by Lord Curzon, the British Foreign Secretary, to the Supreme War Council as a diplomatic basis for a future border agreement.. The line became a major geopolitical factor ...
1 dzień temu · The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near ...
1 dzień temu · Given any curve c : (a, b) → S, one may consider the composition X ∘ c : (a, b) → ℝ 3. As a map between Euclidean spaces, it can be differentiated at any input value to get an element (X ∘ c)′(t) of ℝ 3. The orthogonal projection of this vector onto T c(t) S defines the covariant derivative ∇ c ′(t) X.
1 dzień temu · Skylab was the United States' first space station, launched by NASA, occupied for about 24 weeks between May 1973 and February 1974. It was operated by three trios of astronaut crews: Skylab 2, Skylab 3, and Skylab 4.Operations included an orbital workshop, a solar observatory, Earth observation and hundreds of experiments.Skylab's orbit eventually decayed and it disintegrated in the ...
1 dzień temu · Vienna (/ v i ˈ ɛ n ə / ⓘ vee-EN-ə; German: Wien ⓘ; Austro-Bavarian: Wean) is the capital, most populous city, and one of nine federal states of Austria.It is Austria's primate city, with just over two million inhabitants. Its larger metropolitan area has a population of nearly 2.9 million, representing nearly one-third of the country's population. . Vienna is the cultural, economic ...
1 dzień temu · Turkey, officially the Republic of Türkiye, is a country mainly in Anatolia in West Asia, with a smaller part called East Thrace in Southeast Europe.It borders the Black Sea to the north; Georgia, Armenia, Azerbaijan, and Iran to the east; Iraq, Syria, and the Mediterranean Sea (and Cyprus) to the south; and the Aegean Sea, Greece, and Bulgaria to the west.
