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- Asteroid (24334 bytes)
1: ...ss the gouge on its underside and toward the opposite end. Features as small as 35 m across can be see...
3: == Definition ==
4: ...rman|Erman]]<!--- (1806-1877) not to be confused with Adolf Erman (1854-1937), the egyptologist --->.
6: ...suggestion about the composition of the object or its general location in the solar system, and some a...
8: ...ify asteroids is in terms of size. A working definition is that asteroids are larger than 50 m in diam... - Mercury (planet) (22924 bytes)
1: ...ation]] is 28.3?). Mercury has no [[natural satellite]]s. The only [[spacecraft]] to approach Mercury ...
3: ...e greek sun god [[Helios]]. [[Pythagoras]] is credited for pointing out that they were one and the sam...
10: ...t on Mercury's surface is 6.5 times as intense as it is on Earth, a total [[irradiance]] of 9.13 ...
12: ...[[Impact crater|crater]]s, where it has been deposited by [[comet]] impacts and/or gases arising from ...
16: ...med when lava flows buried earlier terrain. In addition, Mercury has "significant" [[tidal bulge]]s, r... - Cloud (9947 bytes)
5: ...sible wavelengths of light equally and are thus white, but they can appear grey or even black if they ...
7: ...er than water, depending on local atmospheric conditions (what gases are present, and the temperature)...
15: ... flows up the side of a [[mountain]] and cools as it rises higher into the atmosphere (orographic upli...
18: ...of keeping small droplets suspended. As well, conditions inside a cloud are not static: water droplets...
20: ...r salt. In [[supersaturation|supersaturated]] conditions, water droplets may act as condensation nucle... - Venus (planet) (31010 bytes)
1: ...rcular]], with an [[eccentricity (orbit)|eccentricity]] of less than 1%.
3: ...ing Star]]", and when it is visible in dark skies it is by far the brightest [[star]]-like object in t...
5: ...ion of the goddess Venus's hand mirror: a circle with a small cross underneath ([[Unicode]]: ♀)...
7: ...e of its modern association with [[sexually transmitted disease]]s. Some astronomers use ''[[Cytherea...
14: ... between the night and day sides of Venus despite its extremely slow rotation (less than one rotation ... - Mars (27704 bytes)
1: [[Image:Mars.jpg|thumb|right|Mars, with polar ice caps visible.]]
2: ...A00161 modest.jpg|thumb|right|North Polar region with icecap. (Courtesy NASA/JPL-Caltech.)]]
4: ...of "the Red Planet." Mars has two [[Natural satellite|moon]]s ([[Phobos (moon)|Phobos]] and [[Deimos (...
6: ...ircle with a small arrow pointing out from behind it), is a stylized representation of the god [[Mars ...
8: ...[solar day]] on Mars is almost the same length as it is on earth: 24 hours, 39 minutes, and 35.244 sec... - Jupiter (24639 bytes)
2: |+<font size=+1>'''Jupiter'''</font>
4: ...ick for full caption.]]<br/><small><font color="white">Click image for description</font></small>
6: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
9: ...[[kilometre|km]]<br>5.203 363 01 [[Astronomical unit|AU]]
11: ! align="left" | Orbital [[circumference]] - Saturn (planet) (23300 bytes)
4: ...0px|The planet Saturn]]<br> <small><font color="white">Click image for description</font></small>
6: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
9: ...[[kilometre|km]]<br>9.537 070 32 [[Astronomical unit|AU]]
11: ! align="left" | Orbital [[circumference]]
14: ! align="left" | [[Eccentricity (orbit)|Eccentricity]] - Uranus (15207 bytes)
1: <!-- To edit the text of this article, scroll down past the ta...
5: <small><font color="white">Click image for description</font></small>
15: !bgcolor="#c0ffff" colspan="2"| [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
18: ...[kilometre|km]]<br>19.191 263 93 [[Astronomical unit|AU]]
20: !align="left"| Orbital [[circumference]] - Neptune (planet) (18545 bytes)
1: <!-- To edit the text of this article, scroll down past the ta...
4: ...Neptune from Voyager 2]]<br><small><font color="white">Click image for description</font></small>
14: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
17: ...[kilometre|km]]<br>30.068 963 48 [[Astronomical unit|AU]]
19: ! align="left" | Orbital [[circumference]] - Pluto (planet) (26470 bytes)
5: <br/><small><font color="white">'''Brightness map of Pluto'''</font></small>
15: !bgcolor="#a0ffa0" colspan="2"| [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
18: ...[kilometre|km]]<br>39.481 686 77 [[Astronomical unit|AU]]
20: !align="left"| Orbital [[circumference]]
23: !align="left"| [[Eccentricity (orbit)|Eccentricity]] - Ice age (15810 bytes)
2: [[Image:Vostok-ice-core-petit.png|thumb|right|Variations in CO2, temperature an...
4: ..., ''ice age'' is used to refer to colder periods with extensive ice sheets over the [[North America]]n...
10: ...is Agassiz]] of the theory, and Agassiz published it in his book ''ɴude sur les glaciers'' of [[1840]...
12: ...what were being studied were the glacial periods within the past few hundred thousand years, during th...
16: ...nt sea ice extended to or very near the equator. It has been suggested that the end of this ice age w... - Climate change (15859 bytes)
1: ...e caused both by natural forces and by human activities.
3: ...or human caused change and “climate variability” for non-human caused change [http://www.g...
6: [[Image:Vostok-ice-core-petit.png|thumb|right|Variations in CO2, temperature an...
8: ...ropogenic factors (those attributed to human activities).
10: ...mong scientists (as revealed by the [[scientific literature]]) that: - Moon (37975 bytes)
7: <small><font color="white">The Moon as seen from Earth</font></small>
9: ! bgcolor="#ffc0c0" colspan="2" | [[Orbit]]al characteristics
12: ...00 [[kilometre|km]]<br />(0.0026 [[Astronomical unit|AU]])
14: ! align="left" | Orbital [[circumference]]
17: ! align="left" | [[Eccentricity (orbit)|Eccentricity]] - Ice Age (15809 bytes)
1: [[Image:Vostok-ice-core-petit.png|thumb|right|Variations in CO2, temperature an...
3: ..., ''ice age'' is used to refer to colder periods with extensive ice sheets over the [[North America]]n...
9: ...is Agassiz]] of the theory, and Agassiz published it in his book ''ɴude sur les glaciers'' of [[1840]...
11: ...what were being studied were the glacial periods within the past few hundred thousand years, during th...
15: ...nt sea ice extended to or very near the equator. It has been suggested that the end of this ice age w... - Wind power (27669 bytes)
1: ...ind turbines to generate [[electric power|electricity]].
3: ...humb|300px|Map of available wind power over the United States. This type of undetailed map is most use...
9: ... Most of this wind energy can be found at high altitudes where continuous wind speeds of over 160 km/h...
11: ...d and relatively little understood, the basics of its origins are relatively simple. The earth is not ...
13: ...[[albedo]] (reflectivity) of land and water, humidity, and the friction of wind over different terrain... - Arctic Ocean (7316 bytes)
2: ...e Arctic Sea'', classifying it as one of the [[mediterranean sea]]s of the [[Atlantic Ocean]].
7: ...onnected to the Pacific Ocean by the [[Bering Strait]] and to the Atlantic Ocean through the Greenland...
12: ...cific coast of North America and Europe overflies it.
14: ...rn access to the Pacific Ocean via the Bering Strait); strategic location between North America and Ru...
21: ...light, damp and foggy weather, and weak cyclones with rain or snow. - Water (15217 bytes)
1: :''This article focuses on water as it is experienced in everyday life. See [[water (mol...
5: ...vaporation]], [[precipitation (meteorology)|precipitation]], and [[runoff (water)|runoff]] to the [[se...
7: ...he growing [[world population]], and its availability is a major social and economic concern.
13: ...vaporation]], [[precipitation (meteorology)|precipitation]], and [[runoff (water)|runoff]], water is c...
15: ...og]] or [[dew]] for example. When appropriately lit, water drops in the air can [[refract]] the beaut... - Contrail (4281 bytes)
6: ... over Nova Scotia.jpg|thumb|right|250px|A [[satellite]] photo of [[Nova Scotia]] showing numerous cont...
9: ...et]] [[aircraft]] or wingtip vortices which precipitate a stream of tiny [[ice]] crystals in moist, fr...
10: ...our]] that can be seen in the wake of airplanes, either from their exhaust or sometimes from their win...
17: ...m the exhaust into a freezing environment, (as altitude increases, the atmospheric temperature drops) ...
19: ...ne to fly). This drop in air pressure brings with it a drop in temperature, which can cause water to c...
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