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Space
hideSpace 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 the boundless four-dimensional continuum known as spacetime. In mathematics spaces with different numbers of dimensions and with different underlying structures can be examined. The concept of space is considered to be of fundamental importance to an understanding of the universe although disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.
Many of the philosophical questions arose in the 17th century, 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, Immanuel Kant described space and time as elements of a systematic framework which humans use to structure their experience.
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 explaining the existing laws of mechanics and optics.
For more information about Space, read the full article at
Wikipedia.
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News tagged with space
Spitzer Unveils Biggest Milky Way View at Adler Planetarium
Space & Earth / Space Exploration
19 hours ago |
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(PhysOrg.com) -- The world's largest image of our Milky Way galaxy, taken by NASA's Spitzer Space Telescope, went on display this week at the Adler Planetarium in Chicago.
Steering the Ares Rockets on a Straight Path
Space & Earth / Space Exploration
15 hours ago |
5 / 5 (1) |
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(PhysOrg.com) -- The Ares I-X rocket stood more than 325 feet tall on the launch pad at NASA's Kennedy Space Center, Fla. Spectators watched in awe as its massive solid rocket motor blazed to life with a thunderous ...
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Stem cells battle for space
11 hours ago |
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The body is a battle zone. Cells constantly compete with one another for space and dominance. Though the manner in which some cells win this competition is well known to be the survival of the fittest, how stem cells duke ...
System 97W's 'castle wall' breached, and opened up to dissipation
Space & Earth / Earth Sciences
14 hours ago |
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The "walls" of System 97W have been breached, and residents in the Western Pacific Ocean no longer have a tropical cyclone to worry about today. The Joint Typhoon Warning Center cancelled their "formation ...
WISE Launch Scheduled for Dec. 11
Space & Earth / Space Exploration
14 hours ago |
4 / 5 (1) |
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(PhysOrg.com) -- Launch of NASA's Wide-field Infrared Survey Explorer (WISE) from Vandenberg Air Force Base in California is scheduled for Dec. 11.
Keeping Mars Contained
Space & Earth / Space Exploration
15 hours ago |
5 / 5 (1) |
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When robotic spacecraft bring a sample of Mars back to Earth, scientists will need specially-designed facilities to study the samples and prevent them from escaping to the outside world.
Studying a Star Before it is Born
15 hours ago |
4.7 / 5 (3) |
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(PhysOrg.com) -- The first phase of a star's formation are thought to begin deep inside a natal cloud of gas and dust. In the earliest stages, material coalesces under the influence of gravity into so-called ...
NASA Challenges 350 Rocketeers Nationwide to Aim a Mile High
Space & Earth / Space Exploration
15 hours ago |
5 / 5 (1) |
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(PhysOrg.com) -- NASA has invited more than 350 student rocketeers from middle schools, high schools, colleges and universities -- 37 teams nationwide -- to take part in the 2009-2010 NASA Student Launch Projects.
United Nations to probe climate e-mail leak
17 hours ago |
3.4 / 5 (5) |
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(AP) -- The United Nations will conduct its own investigation into e-mails leaked from a leading British climate science center in addition to the probe by the University of East Anglia, a senior U.N. climate ...
Fine-tuned: A wholly new approach to tuning a laser's frequency
17 hours ago |
4.8 / 5 (6) |
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(PhysOrg.com) -- For more than 30 years, scientists have been trying to harness the power of terahertz radiation. Tucked between microwaves and infrared rays on the electromagnetic spectrum, terahertz rays ...
NASA's WISE infrared satellite to reveal new galaxies, stars, asteroids
19 hours ago |
4.8 / 5 (4) |
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(PhysOrg.com) -- Data from the satellite, says principal investigator and UCLA professor Edward Wright, will help scientists answer fundamental questions about the history of our solar system, the Milky Way ...
Checklist for going solar
20 hours ago |
3.3 / 5 (3) |
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With the sun setting before 5 p.m., solar power may be the last thing on your mind these days. But declining panel prices ans a federal tax credit make now a good time to at least investigate whether solar power might make ...
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