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Deep-space exploration is the branch of astronomy, astronautics, and space technology that is involved with exploring the distant regions of outer space. [1] However, little consensus has been reached on the meaning of "distant" regions. In some contexts, it is used to refer to interstellar space.
Deep space exploration is the branch of astronomy, astronautics and space technology that is involved with the exploration of distant regions of outer space. [49] Physical exploration of space is conducted both by human spaceflights (deep-space astronautics) and by robotic spacecraft.
Deep space is defined by the United States government as all of outer space which lies further from Earth than a typical low-Earth-orbit, thus assigning the Moon to deep-space. [118] Other definitions vary the starting point of deep-space from, "That which lies beyond the orbit of the moon," to "That which lies beyond the farthest reaches of ...
Space research is scientific study carried out in outer space, and by studying outer space. From the use of space technology to the observable universe , space research is a wide research field . Earth science , materials science , biology , medicine , and physics all apply to the space research environment.
The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
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Debates concerning the nature, essence and the mode of existence of space date back to antiquity; namely, to treatises like the Timaeus of Plato, or Socrates in his reflections on what the Greeks called khôra (i.e. "space"), or in the Physics of Aristotle (Book IV, Delta) in the definition of topos (i.e. place), or in the later "geometrical conception of place" as "space qua extension" in the ...
In 1977, the Board published the first edition of Urdu Lughat, a 22-volume comprehensive dictionary of the Urdu language. [2] The dictionary had 20,000 pages, including 220,000 words. [3] In 2009, Pakistani feminist poet Fahmida Riaz was appointed as the Chief Editor of the Board. [4] In 2010, the Board published one last edition Urdu Lughat. [3]