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- Asteroid (24334 bytes)
1: ...nd of the asteroid across the gouge on its underside and toward the opposite end. Features as small as...
3: == Definition ==
4: ...p://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1840AN.....17...81E&db_key=AST&high=41e14...
6: The exact definition of an asteroid is unsettled. The term "mi...
8: ...[boulder]]-sized or smaller. The distinction is made because asteroids are large enough to survive pas... - Comet (30542 bytes)
3: ...mets are composed largely of frozen [[carbon dioxide]], [[methane]] and [[water]] with [[dust]] and va...
5: ... sun consisting of debris left over from the [[condensation]] of the [[solar nebula]]; the outer edges...
11: ... sight. They were usually considered bad omens of deaths of kings or noble men, or coming catastrophes...
15: ...ics that tend to be very dark, like [[tar]] or crude [[Petroleum|oil]]. The very darkness of cometary ...
17: ...and far ultraviolet photons [http://www.kvi.nl/~bodewits]. - History of science (41710 bytes)
2: Modern [[science]] is a body of verifiable [[empirical...
4: ... change is considered to be so fundamental that older inquiries are known as ''pre-scientific''. Still...
6: ...] concerns the [[Creativity|creative]] process of designing useful objects and systems, which differs ...
11: ...mphasize the view that scientific data is self-evident, value-free, and context-free.
13: ...e, and that there can be [[demarcation problem|no demarcation]] between science and any other form of ... - Isaac Newton (23339 bytes)
2: ...fried Leibniz|Gottfried Wilhelm Leibniz]] for the development of differential [[calculus]]. While they...
4: ...a prism was inherent in the white light and not added by the prism as [[Roger Bacon]] had claimed in t...
6: ...ped a [[Newton's law of cooling|law of cooling]], describing the rate of cooling of objects when expos...
12: ...ief biography of Newton's early life. For more in-depth information, see [[Isaac Newton's early life a...
14: ... said that his body at that time can even fit inside a quart mug. His father had died three months bef... - Venus (planet) (31010 bytes)
1: ...ugh all planets' [[planetary orbit|orbits]] are [[ellipse|elliptical]], Venus's orbit is the closest to [[c...
5: ...r: a circle with a small cross underneath ([[Unicode]]: ♀).
7: ...m [[Cythera]]. Other less common adjectives include ''Venerean'' and ''Veneran''.
14: ...ficantly between the night and day sides of Venus despite its extremely slow rotation (less than one r...
16: ...quite similar to Earth. A common conceptual misunderstanding regarding Venus is the mistaken belief t... - Mars (27704 bytes)
2: [[Image:Mars NPArea-PIA00161 modest.jpg|thumb|right|North Polar region with icecap....
4: ...]]s ([[Phobos (moon)|Phobos]] and [[Deimos (moon)|Deimos]]) which are both small and oddly-shaped, pos...
8: ...e. Its red, fiery appearance is caused by Iron Oxide (rust) on its surface. Mars has only a quarter th...
11: ...he atmosphere on Mars is 95 percent [[carbon dioxide]], 3 percent [[nitrogen]], 1.6 percent [[argon]],...
13: ... volcanic methane is accompanied by [[sulfur dioxide]]. - Sundial (16148 bytes)
7: ...en designs, such as the 'ordinary' or standard garden sundial, cast a shadow on a flat surface marked ...
9: However, sundials can be designed for any surface where a fixed object casts ...
11: Most sundial designs indicate [[solar time|apparent solar time]].
12: Minor design variations can measure standard and daylight ...
14: Sundials are known from ancient Egypt, and were developed further by other cultures, including the [... - Wildfire (23185 bytes)
8: ...; the word got its present meaning by people misunderstanding the expression "spread like wildfire". [...
14: ...anization of wildlands, these fires often involve destruction of suburban homes located in the wildlan...
16: ...al [[butenolide]]. Most native animals, too, are adept at surviving wildfires.
18: ...ge communities, destroying many homes and causing deaths.
20: ...logging]]) has historically provided the fuel for devastating fires such as the fires in [[Michigan]] ... - Arch (4239 bytes)
5: ...dral]] building and is still used today in some modern structures as for example in [[bridge]]s.
9: ...t span significant distances without collapsing under its own weight. By configuring it into an arch,...
16: ...mpression and which was therefore stronger. This design had been used by the Assyrians as early as 72...
24: ...war. The most famous example of this is the [[Arc de Triomphe]] in [[Paris]], [[France]].
30: ...ffolding would in any case be required by the builders, so the scaffolding can be combined with the ar... - White House (15373 bytes)
4: ...lace of the [[President of the United States|President]] of the [[United States]].
6: ...e [[National Park Service]] and is part of [[President's Park]].
8: ..._twenty_dollar_bill|$20 bill]]. Presidential residences, both temporary and permanent, in the midwest...
12: ...er 13]], [[1792]]. The building he designed was modelled on the first and second floors of [[Leinster ...
14: [[Image:Homenorth.jpg|thumb|right|North side of the White House]] - Hipparchus (astronomer) (50785 bytes)
4: ...chus. However, his synthesis of astronomy superseded Hipparchus's work: although Hipparchus wrote at ...
8: ...eographia'' ("Geography"), and from [[Pliny the Elder]]'s ''[[Pliny's Natural History|Naturalis histor...
10: ...cient history|ancient]] district [[Bithynia]], (modern-day [[İznik, Turkey|İznik]] in provin...
14: ...was calculated by [[Jean Baptiste Joseph Delambre|Delambre]], based on clues in his work. Hipparchus ...
16: ...ts. In the 2nd and 3rd centuries [[coin]]s were made in his honour in Bithynia that bear his name and ... - Hipparchus (50784 bytes)
3: ...chus. However, his synthesis of astronomy superseded Hipparchus's work: although Hipparchus wrote at ...
7: ...eographia'' ("Geography"), and from [[Pliny the Elder]]'s ''[[Pliny's Natural History|Naturalis histor...
9: ...cient history|ancient]] district [[Bithynia]], (modern-day [[İznik, Turkey|İznik]] in provin...
13: ...was calculated by [[Jean Baptiste Joseph Delambre|Delambre]], based on clues in his work. Hipparchus ...
15: ...ts. In the 2nd and 3rd centuries [[coin]]s were made in his honour in Bithynia that bear his name and ... - History of science in the Middle Ages (30877 bytes)
4: ...igation was renewed. Science developed in this golden period of [[Scholasticism|Scholastic philosophy]...
6: ...ong many others. These advances, however, were suddenly interrupted by the [[Black Plague]] and are vi...
14: ...not completely assimiliated by the Roman culture. Debilitated by migrations, barbarian invasions and t...
16: ... culture]] as the [[Dark Ages]]. Nowadays, most modern historians dismiss the use of the term by point...
18: ... Institutionally, these new schools were either under the responsibility of a [[monastery]], a [[cathe... - North Pole (13759 bytes)
3: ...net's North Pole. [[Earth]]'s Pole, however it is defined, lies in the [[Arctic Ocean]].
5: ==Defining North Poles in astronomy==
6:
8: For the magnetic poles, their names are decided upon by the direction that their field lines eme...
14: ...de lies the ''trailing pole''. Io can thus be divided into north and south hemispheres, into pro- and ...
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