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In physical cosmology, the age of the universe is the time elapsed since the Big Bang.Astronomers have derived two different measurements of the age of the universe: [1] a measurement based on direct observations of an early state of the universe, which indicate an age of 13.787 ± 0.020 billion years as interpreted with the Lambda-CDM concordance model as of 2021; [2] and a measurement based ...
Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. [1] It contains ultra-low levels of particle ...
Space exploration is the use of astronomy and space technology to explore outer space. [1] ... ("East 1"), carrying the 27-year-old Russian cosmonaut, Yuri Gagarin ...
An illustration depicts NASA's Voyager 1 spacecraft traveling through interstellar space, or the space between stars, which it entered in 2012.
First space walk/extra-vehicular activity (Alexei Leonov). USSR Voskhod 2: March 1965: First crewed spacecraft to change orbit. USA (NASA) Gemini 3: 14 July 1965: First flyby of Mars (returned pictures). USA (NASA) Mariner 4 [15] 14 July 1965: First photographs of another planet from deep space . USA (NASA) Mariner 4 [15] 15 December 1965
The index k is defined so that it can take only one of three values: 0, corresponding to flat Euclidean geometry; 1, corresponding to a space of positive curvature; or −1, corresponding to a space of positive or negative curvature. [153] The value of R as a function of time t depends upon k and the cosmological constant Λ. [151]
The Space Age is a period encompassing the activities related to the space race, space exploration, space technology, and the cultural developments influenced by these events, beginning with the launch of Sputnik 1 on October 4, 1957, [1] and continuing to the present.
The main character of "Outer Banks" is John B., a 19-year-old living on his own after the death of his father. John Booker Routledge, or John B. Curtis Baker/Netflix.