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Outer space is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It has a near-perfect vacuum of plasma, radiation, magnetic fields and dust, and its size and shape are determined by the Big Bang theory and the cosmic microwave background.
Space exploration is the use of astronomy and space technology to explore outer space, including the Moon, Mars and beyond. Learn about the origins, milestones and challenges of space exploration, from the first telescopes to the current missions and programs.
Learn about the Sun and the objects that orbit it, including the eight planets, the nine dwarf planets, and the small bodies such as asteroids, comets, and moons. Explore the formation, evolution, and features of the Solar System and its place in the Milky Way galaxy.
Outer space is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It has a near-perfect vacuum, low particle density, and various forms of radiation and matter. Learn more about its history, exploration, and features from Wikipedia.
Space is a three-dimensional continuum containing positions and directions, and it is part of a four-dimensional spacetime in modern physics. The article explores the philosophical debates over the nature, essence and existence of space, and the historical developments of space theories from ancient to modern times.
The Outer Space Treaty is a multilateral treaty that forms the basis of international space law. It was opened for signature in 1967 and entered into force in 1968, and it prohibits nuclear weapons and military activities in outer space and on celestial bodies.
Space research is scientific study carried out in outer space, and by studying outer space. It covers various disciplines such as Earth science, materials science, biology, medicine, and physics, and uses rockets, satellites, probes, and telescopes.
Learn about the history, applications, and hazards of space technology, the technology for use in outer space. Explore the achievements and challenges of space exploration, from Sputnik 1 to Voyager 1, and the role of space in everyday life.
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