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- Solar system (21174 bytes)
5: The wide variety of objects that exist in the Solar System...
20: [[Image:Portrait de famille (1 px = 1000 km).jpg|thumb|center|550px|T...
23: ...s, mainly Earth, as well as probes heading into [[deep space]].
25: **[[Space debris]] of artificial origin that can be found in o...
27: ...nt part of non-volatile minerals. They are subdivided into [[asteroid group]]s and [[:Category:Asteroi... - Sun (20830 bytes)
2: ...="margin: 0 0 1em 1em; border: 1px #aaa solid; border-collapse: collapse;" align="right" width=280px
13: ! align="left" | [[Apparent magnitude|Visual brightness]] (''V'')
16: ! align="left" | [[Absolute magnitude]]
48: ! align="left" | Density
76: | 7.25[[degree (angle)|?]] <br>(to the [[ecliptic]]) <br>67.... - Planetary system (2476 bytes)
5: ...w known to be far too low to make this a viable model. Accepted theories today argue that planetary s...
7: ...companions were almost entirely evaporated by the supernova blast, leaving behind planet-sized bodies. Alter... - Planet (8450 bytes)
1: ...jects in orbit around other stars, the problem of defining a planet has become rather more acute.
3: ... gas and dust that orbited the [[protostar]] in a dense protostellar disk before the star's core ignit...
16: ...Mars]] (♂) - 2 satellites ([[Deimos (moon)|Deimos]], [[Phobos (moon)|Phobos]])
25: ... size between Mercury and Ceres, which would include the five objects mentioned above (Pluto, Sedna, O...
27: Planets within Earth's solar system can be divided into categories according to composition. - 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 ... - Johannes Kepler (17038 bytes)
2: '''Johannes Kepler''' ([[December 27]], [[1571]] – [[November 15]], [[1...
4: ...nt to [[Tycho Brahe]]. Kepler's career also coincided with that of [[Galileo Galilei]].
9: ...is said to have been a weak and sickly child, but despite his ill health, he was precociously brillian...
11: ...acizing probably led him to turn to the world of ideas, as well as an abiding religious conviction, fo...
13: ...duced to astronomy/astrology at an early age, and developed a love for that discipline that would span... - Tycho Brahe (17516 bytes)
3: ...]], [[Bohemia]] (now [[Czech Republic]])) was a [[Denmark|Danish]] [[nobleman]], well known as an [[as...
8: ... a [[nobleman]], was an important figure in the [[Denmark|Danish]] King's court. [[Beate Bille]], Tych...
12: ...eu descriptio totius orbis and [[Regiomontanus]]' De triangulis omnimodis.
14: ...e astronomers and all of them disagree. What's needed is a long term project with the aim of mapping t...
16: ...ecame the possessions of Kepler following Tycho's death.) - Hubble Space Telescope (50930 bytes)
16: |'''Deorbit date'''||circa 2010
38: |'''[[WFPC2]]'''||wide field camera
43: ...ons and has helped astronomers achieve a better understanding of many fundamental problems in astrophy...
45: ...e project to build a space telescope was beset by delays and budget problems. Immediately after its l...
49: ==Conception, design and aims== - Californium (7452 bytes)
2: <table border="1" cellpadding="2" cellspacing="0" align="right...
4: <table align="center" border="0">
17: ...s]] </td><td>[[Actinide]]s</td></tr>
34: <table border="1" cellspacing="0" cellpadding="2" width="100%"...
36: ...rgy|DE]] [[mega|M]][[electron volt|eV]]</th><th>[[decay product|DP]]</th></tr> - Iron (23778 bytes)
2: <table border="1" cellpadding="2" cellspacing="0" align="right...
4: <table align="center" border="0">
24: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td>
38: <td>[[van der Waals radius]] </td><td>...
44: <td>[[Oxidation state]]s ([[Oxide]]) </td><td>2,'''3''',4,6 (amphot... - Manganese (14965 bytes)
2: <table border="1" cellpadding="2" cellspacing="0" align="right...
4: <table align="center" border="0">
20: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td>...
32: <td>[[van der Waals radius]] </td><td>...
38: <td>[[Oxidation state]]s ([[Oxide]]) </td><td>7,6,4,'''2''',3 (stro... - Nickel (13955 bytes)
2: {| border="1" cellpadding="2" cellspacing="0" align="right...
4: {| align="center" border="0"
24: |[[Density]], [[Mohs hardness scale|Hardness]]
41: |[[van der Waals radius]]
50: |[[Oxidation state]]s ([[Oxide]]) - History of science in early cultures (11033 bytes)
3: ...on|civilizations]] to develop and more time to be devoted to tasks other than survival, such as the se...
7: ...esources from which to draw are http://www.worldwideschool.org/library/books/sci/history/AHistoryofSci...
9: ... [[Pythagorean theorem|Pythagoras' law]] was recorded, as early as the [[18th century BC]]: the Mesopo...
11: ...] by priests. Indeed, rather than following the modern trend towards [[rational]] science, moving away...
16: ...nd in third millennium cities of [[India]]. Their design can be conservatively dated to the [[1st mill... - Star (12279 bytes)
1: ...mb|right|350px|The [[Pleiades (star cluster)|Pleiades]] star cluster]]
3: ...to Earth to appear as a disk instead, and to provide [[sunlight|daylight]].
7: Distances like this are typical inside galactic discs, where the Sun and Earth are locat...
9: ... [[terametre]]s. However, these have a much lower density than the Sun.
11: ...e Milky Way]], and found no stars over that limit despite a statistical expectation that there should ... - Taurus (constellation) (2696 bytes)
5: ... magnitude]] stars in the sky, the bright red [[Aldebaran]], sits in the middle of this constellation....
7: ==Notable deep sky objects==
9: ...le to the eye, the [[Pleiades (star cluster)|Pleiades]].
11: ...hind Aldebaran lie the [[Hyades (star cluster)|Hyades]], the nearest distinct open [[star cluster]], t...
13: ... the [[Crab Nebula]] ([[Messier object|M1]]), a [[supernova]] remnant northeast of Zeta. The explosion, seen ... - Walter Baade (2275 bytes)
1: {| align="right" style="border:1px solid #CCC; margin-left:15px;" cellpadding="...
23: '''Wilhelm Heinrich Walter Baade''' ([[March 24]] [[1893]] - [[June 25]] [[1960]])...
26: Along with [[Fritz Zwicky]], he proposed that [[supernova]]e could create [[neutron star]]s.
28: ...eda galaxy]] for the first time, which led him to define distinct "[[stellar population|populations]]"...
30: ...mnant of the supernova of the year [[1054]], and identified the optical counterparts of various [[radi...
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