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- Planet (8450 bytes)
28: ...or rocky: Planets that are similar to [[Earth]] — with bodies largely composed of [[Rock (geolog...
43: ...factor of 2.8; S/1993 243 (1) [[Dactyl (asteroid)|Dactyl]] by a factor of 1.3; and, most remarkably, [...
48: ...]s (those outside our solar system) discovered to date have masses which are about the same or larger ...
56: ... solar system. No interstellar planet is known to date, but their existence is considered a plausible ... - Mercury (planet) (22924 bytes)
1: ...riner 10]] ([[1974]]–[[1975|75]]); only 40–45% of the planet has been mapped.
8: (This Data comes from [http://www.answers.com/topic/mercur...
10: ...ure]] of Mercury is 452 K, but it ranges from 90–700 K; by comparison, the temperature on Earth ...
12: Surprisingly, radar observations taken in 1992 indicated that there ...
16: ...rrain. In addition, Mercury has "significant" [[tidal bulge]]s, raised by the [[Sun]] (the Sun's tides... - Venus (planet) (31010 bytes)
3: ...the "[[Evening Star]]", and when it is visible in dark skies it is by far the brightest [[star]]-like ...
5: ...vilization (the Mayans developed a religious calendar based on Venus's motion) and must have been know...
14: ... the upper atmosphere circle the planet in only 4 days, helping to distribute the heat.
18: ...ture, listed in the table, refers to cloud tops — the surface temperature is never below 400°...
21: [[Image:Venus globe.jpg|thumb|left|[[Radar]] image of the surface of Venus, centered at 180... - Saturn (planet) (23300 bytes)
147: ...'' has a period of 10 h 14 min 00 s (844.3°/[[day|d]]) and encompasses the Equatorial Zone, which ...
165: ...rmed out of. This theory is not widely accepted today, since Saturn's rings are thought to be unstable...
169: ===The dark side of the rings===
175: ...1]], [[1979]]; Backlit rings, showing the overall darkness of the rings from this angle. The thickest...
176: ...acklit rings in detail. The thick B ring appears darkest from this side.]] - Neptune (planet) (18545 bytes)
9: | [[Urbain Le Verrier]]<br> [[John Couch Adams]]<br> [[Johann Gottfried Galle|Johann Galle]]
148: ...enomena. The [[Great Dark Spot]], an Earth-sized dark marking resembling the [[Great Red Spot]] of Ju...
152: ...cause it had ''just'' turned retrograde that very day; because it was stationary in the sky and only b...
154: ...rge Airy]], who asked Adams for a clarification; Adams began to draft a reply but never sent it.
156: ...[1846]], [[Urbain Le Verrier]], independently of Adams, produced his own calculations but also experie... - Pluto (planet) (26470 bytes)
124: ...1930]]. The planet was later found on photographs dating back to [[March 19]], [[1915]]. Tombaugh was ...
126: ...ules]]'', ''[[Icarus (mythology)|Icarus]]'', ''[[Idana]]'', ''[[Odin]]'', ''[[Pax (mythology)|Pax]]'',...
128: ...anet in the [[Times]] newspaper. He asked his grandaughter what she thought would be good name for it....
136: ...s diameter is now known since telescopes using [[adaptive optics]] can resolve its disk.
153: ... among planets in that they are [[Tidal locking|tidally locked]] to each other. This means that Charon...
Page text matches
- Christopher Columbus (44177 bytes)
1: ...lumbus''' ([[1451]]<sup>[[#Early life|1]]</sup> – [[20 May]] [[1506]]) ( ''Cristòfor Colom'' in...
5: ...led by [[João Vaz Corte-Real]] to Terra Verde (today's Newfoundland). [[Giovanni Caboto]] (better kno...
7: ... in the Bahamas) is celebrated as a [[Holiday|holiday]].
11: ...ome – including many [[Native Americans]] – view him as responsible, directly or indirectl...
21: ...ant, and his mother was Susanna Fontanarossa, the daughter of a woollens merchant. Christopher had thr... - Ptolemy (10609 bytes)
3: ...μαῖος; [[c.]] [[85]] – c. [[165]]), known in English as '''Ptolemy'''...
5: ... (in Greek ''Η μεγάλη Σύνταξι&sig...
7: ...ains a [[star catalogue]], which is probably an updated version of a catalogue created by Hipparchus. ...
11: ... than degrees of arc (the length of the midsummer day increases from 12h to 24h as you go from the equ...
16: ...g manuscripts of Ptolemy's ''Geography'' however, date only from about 1300, after the text was redisc... - Geography (8541 bytes)
13: ...geographic detail, and more solid theoretical foundations. This period is also known as [[Great Geogra...
70: ... shape the human society. It examines how humans adapt themselves to the land and to other people, and...
92: ...jpg|thumb|250px|right|Desert, near Las Vegas, Nevada . Image provided by [http://classroomclipart.com ...
102: ...alists must understand [[computer science]] and [[database]] systems. GIS has so revolutionized the fi... - History (5192 bytes)
- Cairo (12536 bytes)
6: ...y of the name evolved into the title "Qahirat Al Adaa" meaning "subduer of the enemies". This title wa...
11: ...g|thumb|left|200px|This Envisat ASAR Wide-Swath radar multicolour composite image is focused over the ...
18: ...idges link the Nile islands of [[Gezira]] and [[Roda]], where many government buildings are located an...
32: ...et [[Mars (planet)|Mars]] which was rising on the day the city was founded.
34: ...ol remains a major center for [[Islamic]] study today. The [[Seljuk]]s caputured Cairo in the mid 1100... - Continent (6440 bytes)
30: ...is usually taught in the [[United States]], [[Canada]] and [[Australia]], while the geological 6-conti...
45: ...t there are many [[microcontinent]]s as well: [[Madagascar]], the [[Seychelles]] (or, more accurately,... - Prime Meridian (3211 bytes)
10: # All countries would adopt a universal day.
11: ... universal day would be a [[solar time|mean solar day]], beginning at the mean midnight at Greenwich a...
12: # That nautical and astronomical days everywhere would begin at mean midnight.
17: The [[International Date Line]] (the jagged red line down the right side... - Geology (12007 bytes)
1: ...k]] γη- (''ge-'', "the earth") and λογος (''logos'', "wo...
14: ...cookers, transport of [[ore]]s, extraction of [[soda]], [[sulfur]] and [[alum]], and administrative is...
26: ...out the Earth's history and are still occurring today. In contrast, [[Catastrophism|catastrophism]] is...
29: ...ianism, which influenced the thought of [[Charles Darwin]].
44: ...ked in much the same way over geologic time. A fundamental principle of geology advanced by the 18th c... - Glaciology (3787 bytes)
18:
29: ...ss raised when movement is too rapid to be accommodated by creep. It happens for example, as the centr...
30: ...eak|Horn]] : Spire of rock, also known as a pyramidal peak, formed by the [[headward erosion]] of thre... - Lithosphere (1918 bytes)
- Crust (geology) (1183 bytes)
5: ...s 5 to 10 km thick and is composed primarily of a dark, dense rock called [[basalt]]. The [[continent... - Tectonic plate (1989 bytes)
10: The boundaries of the plates do not coincide with those of t... - Plate tectonics (27764 bytes)
3: ...[oceanic trench]] formation occur along plate boundaries (most notably around the so-called "[[Pacific...
10: ...of Fire]] being most active and famous. These boundaries are discussed in further detail below.
14: == Types of plate boundaries ==
15: ...es.png|thumb|right|350px|Three types of plate boundary.]]
16: ...rface phenomena. The different types of plate boundaries are: - Earth (30908 bytes)
21: ...n by mass [http://earthref.org/cgi-bin/er.cgi?s=erda.cgi?n=547] is:
86: ...[aluminium]] silicate rocks. The crust-mantle boundary occurs as two physically different events. Firs...
120: ...utes and 4.091 seconds ([[sidereal day|1 sidereal day]]) to rotate around the axis connecting the [[no...
122: ...ith respect to the stars at a rate of ca. 1 °/day, i.e. a Sun or Moon diameter every 12 hours east...
126: ...e Sun and the stars at a rate of roughly 12 °/day, i.e. a Moon diameter every hour eastward. - Volcano (27295 bytes)
2: ...east, this phenomenon tends to occur near the boundaries of the [[plate tectonics|continental plates]]...
21: ...or global weather pattern changes. Potential candidates include [[Yellowstone National Park]] and [[La...
24: Volcanoes are usually situated either at the boundaries between [[tectonic plates]] or over [[hot spo...
96: ...anic object in the solar system, due to [[tides|tidal]] interaction with Jupiter. It is covered with v...
111: ...ike on its south side. Photo credit: USGS Digital Data Series]] - Mountain (4538 bytes)
3: ...g on how the rock reacts to the tectonic forces – block mountains or fold mountains.
20: ... have been left in their natural state, and are today primarily used for [[recreation]]. - Age of Exploration (14467 bytes)
1: ...the period were [[Christopher Columbus]], [[Vasco da Gama]], [[Pedro ?vares Cabral]], [[John Cabot]], ...
11: ...e route to the east became far more difficult and dangerous. The [[Black Death]] of the fourteenth cen...
18: ...[Indian Ocean]] was possible. In [[1498]] [[Vasco da Gama]] made good on this promise by reaching Indi...
26: ...found the wealth it had sought in the form of abundant gold. In the Americas the Spanish found a numbe...
31: ... on the [[Gold Coast (Africa)|Gold Coast]], [[Luanda]], [[Mozambique]], [[Zanzibar]], [[Mombassa]], [[... - Antarctica (14761 bytes)
34: ... and British claims; claimed [[1943]] as [[AntᲴida Argentina]], one of the four departments of [[Tie...
36: ...h Claims; claimed [[1940]], as [[comuna de AntᲴida]], one of the two municipalities of [[AntᲴica C...
46: ...?W; overlapped Norwegian claim; claimed [[1939]]–[[1945]] as [[New Schwabenland]]
47: *[[South Africa]]: claimed [[1963]]–[[1994]]
61: * [[Comandante Ferraz Station]], [[King George Island]] ({{co... - Supercontinent (3497 bytes)
1: ...forms [[Eurasia]] qualifies as a supercontinent today.
26: *[[Pangaea Ultima]] ''(~250 – ~400 million years from now)''
28: *[[Pangaea]] ''(~300 – ~180 million years ago)''
29: *[[Pannotia]] ''(~600 – ~540 million years ago)''
30: *[[Rodinia]] ''(~1.1 – ~750 million years ago)'' - Nigeria (19231 bytes)
1: ... the former capital [[Lagos]], [[Abeokuta]], [[Ibadan]], [[Osogbo]], [[Ilesha|Ilesa]], [[Port Harcourt...
36: | '''[[Independence]]'''<br> - Date
57: ...forest people. In the early 19th century, [[Usman dan Fodio]] brought most areas in the north under th...
71: ...the corner. Many people fear the return of Babangida for he is known as the [[Idi Amin]] of Nigeria fo...
87: *[[Adamawa State|Adamawa]]
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