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  2. Space group - Wikipedia

    en.wikipedia.org/wiki/Space_group

    The black boxes outline the unit cell. In mathematics, physics and chemistry, a space group is the symmetry group of a repeating pattern in space, usually in three dimensions. [1] The elements of a space group (its symmetry operations) are the rigid transformations of the pattern that leave it unchanged.

  3. Space Shuttle Challenger disaster - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_Challenger...

    On January 28, 1986, the Space Shuttle Challenger broke apart 73 seconds into its flight, killing all seven crew members aboard. The spacecraft disintegrated 46,000 feet (14 km) above the Atlantic Ocean, off the coast of Cape Canaveral, Florida, at 11:39 a.m. EST (16:39 UTC ). It was the first fatal accident involving an American spacecraft ...

  4. 2001: A Space Odyssey - Wikipedia

    en.wikipedia.org/wiki/2001:_A_Space_Odyssey

    Box office. $146 million. 2001: A Space Odyssey is a 1968 epic science fiction film produced and directed by Stanley Kubrick. The screenplay was written by Kubrick and science fiction author Arthur C. Clarke, and was inspired by Clarke's 1951 short story " The Sentinel " and other short stories by Clarke. Clarke also published a novelisation of ...

  5. 0 - Wikipedia

    en.wikipedia.org/wiki/0

    0 ( zero) is a number representing an empty quantity. Adding 0 to any number leaves that number unchanged. In mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and complex numbers, as well as other algebraic structures.

  6. Display resolution standards - Wikipedia

    en.wikipedia.org/wiki/Display_resolution_standards

    Display resolution standards. A display resolution standard is a commonly used width and height dimension (display resolution) of an electronic visual display device, measured in pixels. This information is used for electronic devices such as a computer monitor. Certain combinations of width and height are standardized (e.g. by VESA [1] [2 ...

  7. YouTube - Wikipedia

    en.wikipedia.org/wiki/YouTube

    YouTube is an American online video sharing platform owned by Google. Accessible worldwide, [note 1] YouTube launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal. Headquartered in San Bruno, California, United States, it is the second most visited website in the world, after Google Search.

  8. Legality of child pornography - Wikipedia

    en.wikipedia.org/wiki/Legality_of_child_pornography

    Child pornography is illegal in most countries, but there is substantial variation in definitions, categories, penalties, and interpretations of laws. Differences include the definition of "child" under the laws, which can vary with the age of sexual consent; the definition of "child pornography" itself, for example on the basis of medium or ...

  9. SpaceX Starship - Wikipedia

    en.wikipedia.org/wiki/SpaceX_Starship

    Starship is a two-stage super heavy-lift launch vehicle under development by SpaceX. As of April 2024, it is the largest and most powerful rocket ever flown. Starship's primary objective is to lower launch costs significantly via economies of scale. [3] This is achieved by reusing both rocket stages, increasing payload mass to orbit, increasing ...