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- Asteroid (24334 bytes)
1: ...is picture of [[433 Eros]] shows the view looking from one end of the asteroid across the gouge on its...
4: The term "asteroid", meaning ''star-like'' (from the [[Greek language|Greek]] ''asteroeides'', '...
8: ...larger than 50 m in diameter, distinguishing them from [[meteoroid]]s, which are typically [[boulder]]...
14: ...Earth's solar system. As of [[May 23]], [[2005]], from a total of 277,090 minor planets with calculate...
24: ...s, whereas families are much "tighter" and result from the catastrophic break-up of a large parent ast... - Comet (30542 bytes)
3: ..."dirty snowballs", comets are composed largely of frozen [[carbon dioxide]], [[methane]] and [[water]]...
5: ...ances from the sun consisting of debris left over from the [[condensation]] of the [[solar nebula]]; t...
9: ... the ion tail (gas) always pointing directly away from the Sun, since the gas is more strongly affecte...
11: ...hs of kings or noble men, or coming catastrophes. From ancient sources, such as Chinese oracle bones, ...
21: ...ncke]] has an orbit which never places it farther from the Sun than [[Jupiter (planet)|Jupiter]]. Shor... - History of science (41710 bytes)
6: ...r [[empirical]] [[truth]]. [[Philosophy]] differs from science in that, while both the [[Natural scien...
11: ...fic data is self-evident, value-free, and context-free.
21: ...ccount of the development of (natural) philosophy from ancient times until recent times can be found i...
27: ...rehistoric times, advice and knowledge was passed from generation to generation in an [[oral tradition...
52: ...oration by bringing together people and new ideas from all over the Islamic world. - Isaac Newton (23339 bytes)
2: ...n also shares credit with [[Gottfried Leibniz|Gottfried Wilhelm Leibniz]] for the development of diffe...
4: ...]]s (such as those of [[comet]]s) were not only [[ellipse|elliptic]], but could also be [[hyperbola|hyperbo...
25: ...later life, to illustrate how he drew inspiration from everyday events.
31: ...ience). Newton argued that this should exempt him from the normal ordination requirement, and [[Charle...
36: ...'s ideas, Newton was so offended that he withdrew from public debate. The two men remained enemies un... - Venus (planet) (31010 bytes)
1: ...ugh all planets' [[planetary orbit|orbits]] are [[ellipse|elliptical]], Venus's orbit is the closest to [[c...
3: ..., it always appears in roughly the same direction from Earth as the Sun (the greatest [[elongation]] i...
7: ...me astronomers use ''[[Cytherean]]'', which comes from [[Cythera]]. Other less common adjectives incl...
14: ...]'s, even though Venus is nearly twice as distant from the Sun and only receives 25% of the solar irra...
16: ...k into space. This prevents most of the sunlight from ever heating the surface. Venus's [[Bolometer|... - Mars (27704 bytes)
4: '''Mars''' is the fourth [[planet]] from the [[Sun]] in the [[solar system]]. It is name...
6: ...#x2642; (a circle with a small arrow pointing out from behind it), is a stylized representation of the...
15: ...en summer and winter, giving rise to Earth-like [[frost]] and large [[cirrus cloud]]s [http://marsrove...
18: ...tic field would have helped to protect the planet from [[cosmic radiation]]. Other explanations have a...
22: Amongst the findings from the Opportunity rover is the presence of [[hema... - Sundial (16148 bytes)
14: Sundials are known from ancient Egypt, and were developed further by ot...
24: ...rection table, and must be adjusted for longitude from the center of the time zone. The admittedly in...
34: The sun casts a shadow from the gnomon to a surface called the ''dial face'...
67: ...t of the gnomon (the ''substyle'') are calculated from the formula face-angle = arctan(sin(latitude)*t...
74: ...tional ancient convenience. They are easy to see from large distances and inexpensive to arrange. On... - Wildfire (23185 bytes)
2: ...n Bernardino, California]] Mountains (image taken from the [[International Space Station]])]]
16: ...researchers discovered that exposure to [[smoke]] from burning plants actually promotes [[germination]...
18: ...erty]], particularly when they have reached urban-fringe communities, destroying many homes and causin...
30: ... of water in plants is balanced by water absorbed from the soil. Below this threshold, the plants dry ...
43: ...aft]] caused by a large wildfire will draw in air from surrounding areas. These self-generated winds c... - Arch (4239 bytes)
16: ...e semicircular arch can be flattened to make an [[ellipse|elliptical]] arch. The horseshoe arch is based o...
24: ...f this is the [[Arc de Triomphe]] in [[Paris]], [[France]].
30: ...ort. Occasionally arches would fall down when the frame was removed if construction or planning had be... - White House (15373 bytes)
16: ...left|19th Century view of the White House as seen from the southwest, with the old West Wing visible.]...
20: ...ainted white as early as 1798, and the repainting from the fire damage did not originate the term "Whi...
28: ...dential review of the troops from a grandstand in front of the White House instead of the traditional ...
32: ...nce rather than risk alienating some associate or friend of a powerful politician or opinion-maker.
59: [[Image:EllipseandWhiteHouse.jpg|thumb|left|300px|Ellipse and White House, early 20th century]] - Hipparchus (astronomer) (50785 bytes)
4: ...e accumulated over centuries by the [[Chaldeans]] from [[Babylonia]]. He was also the first to compil...
8: ...om [[Strabo]]'s ''Geographia'' ("Geography"), and from [[Pliny the Elder]]'s ''[[Pliny's Natural Histo...
14: ...st observations. Hipparchus obtained information from [[Alexandria]] as well as [[Babylon]], but it i...
18: ...tes observations to him from Rhodes in the period from [[141 BC]] to [[127 BC]].
20: ...mentioned about 14 books, but which is only known from references by later authors. His famous star c... - Hipparchus (50784 bytes)
3: ...e accumulated over centuries by the [[Chaldeans]] from [[Babylonia]]. He was also the first to compil...
7: ...om [[Strabo]]'s ''Geographia'' ("Geography"), and from [[Pliny the Elder]]'s ''[[Pliny's Natural Histo...
13: ...st observations. Hipparchus obtained information from [[Alexandria]] as well as [[Babylon]], but it i...
17: ...tes observations to him from Rhodes in the period from [[141 BC]] to [[127 BC]].
19: ...mentioned about 14 books, but which is only known from references by later authors. His famous star c... - History of science in the Middle Ages (30877 bytes)
14: ... of [[Rome]] in the [[5th century]], and isolated from the rest of the world by the spread of [[Islam]...
16: ...rpretation. Given the limited scientific advances from about [[476]] to about [[1000]], this period ca...
18: ...ic]], [[geometry]], [[astronomy]] and [[music]]). From the year [[787]] on, [[decree]]s began to circu...
20: ...e rebirth of the interest in speculative inquiry; from this interest would follow the rise of the [[Sc...
27: ...the texts of the ''ancients'' and started a new infrastructure which was needed for scientific communi... - North Pole (13759 bytes)
6: ...kwise as seen from above the north pole). Another frequently used definition uses the right-hand rule ...
10: ...ar shape and [[gravity|gravitational]] influences from nearby planets and moons.
14: ...o's orbit (best defined as the point most removed from the plane formed by the north-south and near-fa...
23: ...'' is defined as the point in the Arctic farthest from any coastline, and is at {{coor dm|84|03|N|174|...
27: ...International Astronomical Union]] have defined a framework called the [[International Terrestrial Ref...
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