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- Industrial Revolution (30001 bytes)
1: ...t of all-metal machine tools in the first two decades of the nineteenth century enabled the manufactur...
3: ...wth of the [[internal combustion engine]] and the development of [[Electric power|electrical power gen...
5: ...red to the [[Neolithic revolution]], when mankind developed [[agriculture]] and gave up its [[nomad|no...
10: ...he accompanying development of international [[trade]], creation of [[financial market]]s and accumula...
12: ...h often imposed tolls and [[tariff]]s on goods traded among them. - Constellation (3718 bytes)
4: ...ficial" constellation, that is, one that may be widely known but is not recognized by astronomers or t...
8: ...he [[International Astronomical Union]] (IAU) divides the sky into 88 official constellations with pre...
14: ... gaps between Ptolemy's patterns. The Greeks considered the sky as including both constellations and d...
16: ...ators [[Pieter Dirkszoon Keyser]] and [[Frederick de Houtman]] in the sixteenth century and first cata...
21: ...For more information about star names, see [[Star designation]]s and the [[list of stars by constellat... - Digital photography (33923 bytes)
4: ...ther devices, such as [[mobile phone]]s, now include digital photography features.
10: * [[charge-coupled device]] (CCD)
18: ...onsumer digital cameras became available for considerably lower prices. (The [[Ritz Dakota Digital]] i...
22: ...eb cam]]s at the lowest-end, a [[digital memory]] device (usually [[flash memory]]; [[floppy disk]]s a...
24: ...can take still photographs, and store them on [[videotape]] or on flash memory cards. - List of astronomers (40322 bytes)
1: ...s [[astronomer]]s and [[astrophysicist]]s''' include:
9: *[[George Ogden Abell]] ([[United States|USA]], [[1927]] –...
19: *[[George Biddell Airy]], ([[England]], [[1801]] – [[1892]]...
26: *[[Harold Alden]] ([[United States|USA]], [[1890]] – [[196...
27: *[[Hannes Alfv鮝] ([[Sweden]], [[1908]] – [[1995]]) - Aluminium (26079 bytes)
1: {{Elementbox_header | number=13 | symbol=Al | name=aluminium | left=...
10: {{Elementbox_density_gpcm3nrt | 2.70 }}
11: {{Elementbox_densityliq_gpcm3mp | 2.375 }}
20: ...{Elementbox_oxistates | 3<br />([[amphoteric]] oxide) }}
41: ...] | dm=[[Positron emission|β<sup>+</sup>]] | de=1.17 | pn=26 | ps=[[magnesium|Mg]] }} - Star (12279 bytes)
1: ...mb|right|350px|The [[Pleiades (star cluster)|Pleiades]] star cluster]]
3: ...to Earth to appear as a disk instead, and to provide [[sunlight|daylight]].
7: Distances like this are typical inside galactic discs, where the Sun and Earth are locat...
9: ... [[terametre]]s. However, these have a much lower density than the Sun.
11: ...e Milky Way]], and found no stars over that limit despite a statistical expectation that there should ... - Ursa Major (6591 bytes)
8: ...ation]]s of Alpha to Eta Ursae Majoris, in that order. Mizar has a companion star called [[Alcor]], ju...
12: ...n [[Sagittarius]]. A few other members have been identified, and it has been given the name [[Ursa Maj...
20: These stars are found along the southwest border of the constellation, the bear's toes.
22: ...binary]] [[variable star]]s, and ranges in magnitude between 7.75m and 8.48m.
26: ==Notable [[deep sky object]]s== - Aspirin (9960 bytes)
4: ...ark]]. In countries in which Aspirin remains a trademark, the [[initialism]] '''ASA''' is used as a ge...
8: ...ing property makes it useful for reducing the incidence of heart attacks. Aspirin produced for this pu...
10: ...and stomach bleeding) and [[tinnitus]]. Another side effect, due to its anticoagulant properties, is i...
11: {| border="1" cellpadding="2" cellspacing="0" bordercolor="#000000" style="float:right"
34: ...wrote in the [[5th century BC]] about a bitter powder extracted from [[willow]] bark that could ease a...
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