Space is the boundless, three-dimensional extent in which objects and events occur and have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. In mathematics, "spaces" are examined with different numbers of dimensions and with different underlying structures. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.
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 khora (i.e. "space"), or in the Physics of Aristotle (Book IV, Delta) in the definition of topos (i.e. place), or even in the later "geometrical conception of place" as "space qua extension" in the Discourse on Place (Qawl fi al-Makan) of the 11th century Arab polymath Alhazen. Many of these classical philosophical questions were discussed in the Renaissance and then reformulated in the 17th century, particularly during the early development of classical mechanics. In Isaac Newton's view, space was absolute—in the sense that it existed permanently and independently of whether there were any matter in the space. Other natural philosophers, notably Gottfried Leibniz, thought instead that space was a collection of relations between objects, given by their distance and direction from one another. In the 18th century, the philosopher and theologian George Berkeley attempted to refute the "visibility of spatial depth" in his Essay Towards a New Theory of Vision. Later, the metaphysician Immanuel Kant said neither space nor time can be empirically perceived, they are elements of a systematic framework that humans use to structure all experiences. Kant referred to "space" in his Critique of Pure Reason as being: a subjective "pure a priori form of intuition", hence it is an unavoidable contribution of our human faculties.
In the 19th and 20th centuries mathematicians began to examine non-Euclidean geometries, in which space can be said to be curved, rather than flat. According to Albert Einstein's theory of general relativity, space around gravitational fields deviates from Euclidean space. Experimental tests of general relativity have confirmed that non-Euclidean space provides a better model for the shape of space.
Other articles related to "space":
... "Ordeal in Space" is a science fiction short story by Robert A ... to Save, dedicated "to those who venture into space," in the story ... The Roads Must Roll" "Blowups Happen" "The Man Who Sold the Moon" "Delilah and the Space Rigger" "Space Jockey" "Requiem" "The Long Watch" "Gentlemen, Be Seated!" "The Black Pits ...
... The Soviet space program, founded by Sergey Korolev, was especially successful. 1957 Soviet Union launched the first space satellite Sputnik ... On 12 April 1961 Yuri Gagarin became the first human to travel into space in the Soviet spaceship Vostok 1 ...
... Psychologists first began to study the way space is perceived in the middle of the 19th century ... Psychologists analyzing the perception of space are concerned with how recognition of an object's physical appearance or its interactions are perceived, see, for example, visual space ... self preservation as well as simply one's idea of personal space ...
... Rohrabacher was chairman of the Subcommittee on Space and Aeronautics from 1997 to January 2005 and has been active on space-related issues ... In 2000, Space.com described Rohrabacher as "a strident advocate for supremacy in space, a philosophy shaped along a winding road from libertarian activist to White ...
... Beam Piper's Space Viking, Larry Niven's Known Space, Jerry Pournelle's CoDominium, Poul Anderson's Polesotechnic League and several other works of science fiction literature ... in activities such as exploration, ground and space battles, and interstellar trading ... Traveller was intended to be a system for playing generic space opera-themed science fiction adventures in much the same sense that Dungeons Dragons was a system intended for generic fantasy adventures ...
Famous quotes containing the word space:
“In the tale properwhere there is no space for development of character or for great profusion and variety of incidentmere construction is, of course, far more imperatively demanded than in the novel.”
—Edgar Allan Poe (18091849)
“Shall we now
Contaminate our fingers with base bribes,
And sell the mighty space of our large honors
For so much trash as may be grasped thus?
I had rather be a dog and bay the moon
Than such a Roman.”
—William Shakespeare (15641616)
“But alas! I never could keep a promise. I do not blame myself for this weakness, because the fault must lie in my physical organization. It is likely that such a very liberal amount of space was given to the organ which enables me to make promises, that the organ which should enable me to keep them was crowded out. But I grieve not. I like no half-way things. I had rather have one faculty nobly developed than two faculties of mere ordinary capacity.”
—Mark Twain [Samuel Langhorne Clemens] (18351910)