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- Skull (7027 bytes)
6: [[Image:Gray 188 - Side view of the skull.png|thumb|Human skull (side)]]
17: ...how that you can count a baby's heartrate by observing his or her pulse pulsing softly through the ant...
22: ...tical reasons and not only as an attempted life-saving technique.
24: ...he skull also contains the [[sinus cavity|sinus cavities]]. The [[meninges]] are the membranes that se...
63: *[[superior orbital fissure]] - Woodworking (12397 bytes)
1: [[Image:Woodcarvings of cranes.jpg|right|thumb|Artists can use wood...
2: ...rking''' is the process of building, making or carving something using [[wood]].
7: ...mitive human beings. Indeed, the development of civilization was closely tied to the development of in...
9: ...ite]] of [[Fellbach-Schmieden]] in Germany has provided fine examples of wooden animal statues from th...
11: Two ancient civilizations that used woodworking were the [[Ancient... - Earth (30908 bytes)
14: ...iameter of approximately 12,742 km. The maximum deviations from this are the highest point on Earth (t...
17: ...)|mantle]], a liquid outer core that is much less viscous than the mantle, and a solid inner core. The...
55: ...iginally generated during its accretion (see [[gravitational binding energy]]), and since then additio...
70: The core is divided into two parts, a solid inner core with a [[ra...
72: Recent evidence has suggested that the inner core of Earth m... - Thoth (5655 bytes)
1: ...Image:Ancient_eygpt-1.jpg|thumb||170px|Clipart provided by <br> [http://classroomclipart.com Classroom...
3: ...f the Moon organized much of Egyptian society's civil and religious rituals and events, so Thoth was a...
20: The online community environment oriented towards people interested in the ...
22: The name of the main Orbital Frame in the Playstation 2 game "The Zone of the ...
24: ...SG-1]], Thoth is a [[Goa'uld]] engineer in the service of the [[System Lord]] [[Anubis_(Stargate)|Anub... - Chemistry (12553 bytes)
3: ...g|thumb|200px|Chemistry Flask Clipart .Clipart provided by [http://classroomclipart.com Classroom Clip...
9: Chemistry typically is divided into several major sub-disciplines. There are ...
13: ...nd chemical [[interaction]]s that take place in living [[organism]]s.
21: ...putational Chemistry]], [[Electrochemistry]], [[Environmental chemistry]], [[Geochemistry]], [[History...
36: ...art.jpg|thumb|250px|Chemistry Clipart .Clipart provided by [http://classroomclipart.com Classroom Clip... - Solar system (21174 bytes)
5: ...hought. This encyclopedia employs the following divisions:
27: ...s and families|families]] based on their specific orbital characteristics.
31: ...ces and have highly eccentric orbits, generally having a [[perihelion]] within the orbit of the inner ...
33: ...es]] lie beyond Neptune's. These are further subdivided:
36: ...bit extending from about 76 to 928 AU, does not obviously fit in either category, although its discove... - Sun (20830 bytes)
13: ! align="left" | [[Apparent magnitude|Visual brightness]] (''V'')
51: ! align="left" | Surface [[gravity]]
59: | 5780 [[kelvin|K]]
128: ...out [[1 E15 s|226 Ma]] (226 million years). The [[orbital speed]] is 217 km/s, i.e. 1 light-year in ca. 140...
136: ...]] is 18 million times weaker than its surface gravity (at the equator). Tidal effects from the plane... - Planetary system (2476 bytes)
5: ...ion is now known to be far too low to make this a viable model. Accepted theories today argue that pl...
7: ...st entirely evaporated by the supernova blast, leaving behind planet-sized bodies. Alternatively, pla...
15: ...arf]] star and the first discovered to be in an [[orbital resonance]] - Asteroid (24334 bytes)
1: ...ight|250px|This picture of [[433 Eros]] shows the view looking from one end of the asteroid across the...
8: ... is made because asteroids are large enough to survive passage through [[Earth's atmosphere]] and stri...
16: ...very rare occasions, a near-Earth asteroid may be visible without technical aid; see [[2004 MN4]]).
21: ...stics of their orbits and on the details of the [[visible spectrum|spectrum]] of sunlight they reflect...
24: ...e divided into groups and families based on their orbital characteristics. It is customary to name a group ... - Comet (30542 bytes)
5: ...[phase (matter)|state]]. [[Asteroid]]s originate via a different process, but very old comets which h...
9: ..., and follows magnetic field lines rather than an orbital trajectory. While the solid body of the comet (c...
11: ... but a few each decade become bright enough to be visible with the naked eye. Before the invention of ...
15: ...l. Solar heating drives off volatile compounds leaving behind heavy long-chain organics that tend to b...
17: ...f X-rays and far ultraviolet photons [http://www.kvi.nl/~bodewits]. - Space exploration (14877 bytes)
1: ... race]] between the [[United States]] and the [[Soviet Union]].
4: ...outer-earth missions was no longer a dream, but a viable practice.
6: ...e [[U.S. Space & Rocket Center]] museum in [[Huntsville, Alabama]] next to [[Redstone Arsenal]] displa...
13: ...l in orbit on [[November 3]], [[1957]]. The first orbital flight made by a human being was [[Vostok 1]], ca...
15: ...ion Team]] launched the [[GoFast Rocket]] on a suborbital flight, the first amateur space flight. On [[June... - Mercury (planet) (22924 bytes)
16: ...two distinct ages; the younger plains are less heavily cratered and probably formed when lava flows bu...
20: ...o]] features (areas of markedly different reflectivity)
28: ...rth's density. The reason that Mercury, despite having so much iron, has less density than Earth is th...
34: ...pparent motion]] ceases; at perihelion, Mercury's orbital velocity then exceeds the rotational velocity; th...
47: ! align="left" | Orbital [[circumference]] - Galileo Galilei (33761 bytes)
2: ...tific revolution]]. His achievements include improving the [[telescope]], a variety of astronomical ob...
5: ... was born in [[Pisa]], [[Italy]], as the son of [[Vincenzo Galilei]], a mathematician and musician.
10: ...antitative approach. However, Galileo's father, [[Vincenzo Galilei]], had performed experiments in whi...
18: ... [[Venice|Venetian]] lawmakers. His work on the device also made for a profitable sideline with mercha...
24: ...[[Copernicus]] predicted that all phases would be visible since the orbit of Venus around the [[Sun]] ... - Season (10047 bytes)
2: ...or [[temperate]] regions, the year is typically divided into four seasons: ''[[spring (season)|spring]...
4: ...han the average temperature. [[Ancient Egypt]] divided the year into three seasons, the season of the...
18: ...ot perpendicular]] to its [[orbital plane]]; it deviates by an angle of approximately 23.5 [[degree (a...
24: ...here it is autumn in the Southern hemisphere, and vice versa.
28: ...of temperature records over the past 300 years (David Thompson, ''SCIENCE'', April 1995) shows that th... - Venus (planet) (31010 bytes)
3: ...Star]]" or the "[[Evening Star]]", and when it is visible in dark skies it is by far the brightest [[s...
5: ...ound [[1600s BC|1600 BC]], and to the [[Maya]]n civilization (the Mayans developed a religious calenda...
16: ...metric]] [[albedo]] is approximately 60%, and its visual light albedo is even greater. Thus, despite ...
23: ...axis, tilted at 97.86 degrees, almost lies in its orbital plane.) It is not known why Venus is different in...
25: ...lanta Planitia]], [[Guinevere Planitia]], and [[Lavinia Planitia]]. With only the exception of Maxwell... - Mars (27704 bytes)
1: ...ge:Mars.jpg|thumb|right|Mars, with polar ice caps visible.]]
4: ...reek mythology]]) because of its [[red]] color as viewed in the night sky. This feature also earned it...
13: ...he gas on the planet. [[volcanism|Volcanic]] activity, [[comet]] impacts and the existence of life in...
15: ...ther with the change between summer and winter, giving rise to Earth-like [[frost]] and large [[cirrus...
18: ...blished in [[1999]] is that these bands could be evidence of the past operation of [[plate tectonics]]... - Jupiter (24639 bytes)
11: ! align="left" | Orbital [[circumference]]
23: ! align="left" | [[Orbital period]]
29: ! align="left" | [[Avg. Orbital Speed]]
32: ! align="left" | Max. Orbital Speed
35: ! align="left" | Min. Orbital Speed - Saturn (planet) (23300 bytes)
11: ! align="left" | Orbital [[circumference]]
23: ! align="left" | [[Orbital period]]
29: ! align="left" | [[Avg. Orbital Speed]]
32: ! align="left" | Max. Orbital Speed
35: ! align="left" | Min. Orbital Speed - Uranus (15207 bytes)
20: !align="left"| Orbital [[circumference]]
32: !align="left"| [[Orbital period]]
38: !align="left"| [[Orbital speed]]
41: !align="left"| Max. Orbital Speed
44: !align="left"| Min. Orbital Speed - Neptune (planet) (18545 bytes)
19: ! align="left" | Orbital [[circumference]]
31: ! align="left" | [[Orbital period]]
37: ! align="left" | [[Avg. Orbital Speed]]
40: ! align="left" | Max. Orbital Speed
43: ! align="left" | Min. Orbital Speed
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