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A wide field view of outer space as seen from Earth's surface at night. The interplanetary dust cloud is visible as the horizontal band of zodiacal light, including the false dawn [29] (edges) and gegenschein (center), which is visually crossed by the Milky Way. Outer space is the closest known approximation to a perfect vacuum.
In such statements, "reaching the edge of space" merely refers to going higher than average aeronautical vehicles commonly would. [11] [12] There is still no international legal definition of the demarcation between a country's air space and outer space. [13] In 1963, Andrew G. Haley discussed the Kármán line in his book Space Law and ...
Space exploration is the use of astronomy and space technology to explore outer space. [1] While the exploration of space is currently carried out mainly by astronomers with telescopes , its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight .
Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities , constituting a near-perfect vacuum of predominantly hydrogen and helium plasma , permeated by electromagnetic radiation , cosmic rays , neutrinos , magnetic fields and dust .
Space industry refers to economic activities related to manufacturing components that go into outer space (Earth's orbit or beyond), delivering them to those regions, and related services. [ 1 ] [ 2 ] [ 3 ] Owing to the prominence of satellite-related activities, some sources use the term satellite industry interchangeably with the term space ...
The outer Oort cloud may have trillions of objects larger than 1 km (0.6 mi), [4] and billions with diameters of 20-kilometre (12 mi). This corresponds to an absolute magnitude of more than 11. [20] On this analysis, "neighboring" objects in the outer cloud are separated by a significant fraction of 1 AU, tens of millions of kilometres.
The following outline is provided as an overview and topical guide to space science: Space science – field that encompasses all of the scientific disciplines that involve space exploration and study natural phenomena and physical bodies occurring in outer space, such as space medicine and astrobiology. [1] [2]
Scott Park Manley [2] (born 31 December 1972) is a Scottish-American science communication YouTuber, gamer, astrophysicist, and programmer.On his YouTube channel, he makes videos discussing space-related topics and news, mainly concerning up-to-date rocket science developments. [3]