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Space has been an interest for philosophers and scientists for much of human history, and hence it is difficult to provide an uncontroversial and clear definition outside of specific defined contexts. Disagreement exists on whether space itself can be measured or is part of the measuring system. (See Space in philosophy.) The term is also used somewhat differently in different fields of study. Many fields use an operational definition in which the units of measurement are defined.

Mathematical spaces


In mathematics, a space is a set, with some particular properties and usually some additional structure. It is not a formally defined concept as such, but a generic name for a number of similar concepts, most of which generalize some abstract properties of the physical concept of space.

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NPR Topics: Politics & Society

Looking Back on Jesse Helms' Life
Fri, 04 Jul 2008 18:14:00 -0400
Sen. No, as he was often called, "was a real throwback," says Merle Black, a professor of southern politics at Emory University. One of a select group of politicians who helped solidify Republican control in the South, he had a loyal constituency of working-class whites in North Carolina.
Financial Aid Woes Make Community College More Appealing
Fri, 04 Jul 2008 16:05:00 -0400
Despite efforts by the Bush Administration and Congress to quell turmoil in the student loan market, some students are still struggling to find money for college. We examine the case of two recent high school graduates who have been promised financial aid, but don't know how much they can count on.
When Did Flag Pins Become So Important?
Fri, 04 Jul 2008 16:00:00 -0400
Sen. Barack Obama Obama was questioned about why he doesn't always wear a flag pin during a Democratic debate in April. His critics say his lack of pin casts doubt on Obama's patriotism, and recently the Democratic candidate has been wearing one.

The Talk of the Town

The Chill
Nick Paumgarten Mon, 30 Jun 2008 04:00:00 -0000
If you had stumbled into Banjo Jim’s, in the East Village, on a recent Wednesday night and encountered a sixty-something guy leading a band through a fervent rendition of “Wild Thing,” for an audience of two dozen or so, you might have concluded, “This is lame,” and slipped back . . .
Oily Speculations
James Surowiecki Mon, 30 Jun 2008 04:00:00 -0000
When bad things happen, it’s always nice to have a scapegoat. So, with Americans furious about soaring oil prices, Congress has gone in search of someone to blame. There are a number of usual suspects to choose from, depending on your politics--OPEC, greedy oil companies, lily-livered environmentalists opposed . . .
Obama’s Iraq Problem
George Packer Mon, 30 Jun 2008 04:00:00 -0000
In February, 2007, when Barack Obama declared that he was running for President, violence in Iraq had reached apocalyptic levels, and he based his candidacy, in part, on a bold promise to begin a rapid withdrawal of American forces upon taking office. At the time, this pledge represented conventional thinking . . .

 
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Encyclopedia Astronautica - Comprehensive resource providing detailed articles on most space technology subjects and space flight history.
Meta Description: [ Mark Wade Encyclopedia Astronautica most complete resource for rockets spacecraft launch vehicles astronauts cosmonauts spaceflight engines space history exploration ]

A Giant Leap for Mankind - Life Magazine's photo and video essay of the space race.

A Timeline of Rocket History - An overview of the development of rocketry.

Beyond the Atmosphere: Early Years of Space Science - A book-length history of the period between Sputnik I and the creation of NASA, by the NASA History Office.

Canada In Space - Basic overview of Canada's space telecommunications program.
Meta Description: [ CBC.ca/Kids is a safe place for kids to play fun online games like BMX biking, snowboarding and trampoline. Check out the latest shows and discuss opinions on all your favourite things! ]

Canadian Space Milestones - Major achievements in Canada's satellite and astronaut programs.

collectSPACE - Source for space history and artifacts; features a worldwide appearance of astronaut appearances and original news articles
Meta Description: [ Source for space history, space artifacts, and space memorabilia. Learn where astronauts will appear, browse collecting guides, and read original space history-related daily reports. ]

From Sputnik to Moon Shot - Annotated timeline showing all space missions from Sputnik I to Apollo XI, with some pictures.
Meta Description: [ An interactive timeline of early space exploration from the launch of Sputnik up to the modern day. ]

History of Space Exploration - Several articles and publications, with illustrations and educator guides.
Meta Description: [ This is a list of past, present, and future planetary and solar missions ]

Planetary Exploration Tour - Guide to historical missions.

Residence in Space - A collection of a few short articles on various topics within space history.
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Romance to Reality - Annotated bibliography of moon and Mars planning documents.

Space Exploration - Past and future mission timelines, and a history of early launches.

500 Space Exploration Merit Badge - How to get a Boy Scout Space Exploration Merit Badge. Includes a brief summary of early space travel and a timeline of events in space exploration from the 1950s.

Summary of Human Space Flight History - Timeline of space missions impacting on human physiology and medicine.

The Problem of Space Travel - A translation of Hermann Noordung's 1929 Das Problem der Befahrung des Weltraums, this book is one of most extensive early studies of the technical and engineering details of a space station. Part of the NASA history series.

The Space Race - Information on the Mercury, Gemini, and Apollo, and Soviet space programs, astronauts, and rockets. Includes a glossary and discussion board.

Time Newsfile: Space Exploration - Original magazine articles from key events in space exploration.
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Voyage to the Milky Way - Companion site to the PBS film. Mars missions, interactive speed timeline, and a look at where space exploration is taking us.
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Woomera - Offers history of Australia's activities in rocket and missile testing at the Woomera Range. Includes personal memories of many ex-residents.
Meta Description: [ Australia's Woomera Rocket Range was one of the world's busiest launch sites for testing rockets and missiles during the 1950's and 1960's. It also was used as the launch site for two satellites. ]

Space related videos
City Repair Project"; who transform space into place. http://coanews.org/alerts ... space new urbanism urban city ...
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