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- Solar system (21174 bytes)
16: **[[Neptune (planet)|Neptune]] (♆)
32: ...t they remain in the region between Jupiter and Neptune.
33: ...e [[semimajor axis|semi-major axes]] lie beyond Neptune's. These are further subdivided:
36: ...covered object [[90377 Sedna]], with a highly elliptical orbit extending from about 76 to 928 AU, does...
38: ...pg|right|thumb|Mosaic of Solar System planets except Pluto, including Earth's Moon (not to scale).]] - Sun (20830 bytes)
76: | 7.25[[degree (angle)|?]] <br>(to the [[ecliptic]]) <br>67.23? <br>(to the [[Milky Way|galactic ...
162: ..., interspersed with atomic [[absorption line|absorption lines]] from the tenuous layers above the phot...
173: spectrum of emission and absorption lines. It is called the ''[[chromosphere]]'' ...
183: ...um of the Sun showing thousands of elemental absorption lines ([[fraunhofer lines]]).]]
187: ...her over time, causing magnetic field loops to erupt from the Sun's surface and trigger the formation ... - Planetary system (2476 bytes)
5: ... be far too low to make this a viable model. Accepted theories today argue that planetary systems for...
7: ...companions were almost entirely evaporated by the supernova blast, leaving behind planet-sized bodies. Alter... - Planet (8450 bytes)
7: ...e named after [[Roman mythology|Roman]] gods, except for Earth which was not seen as a planet by the a...
20: # [[Neptune (planet)|Neptune]] (♆) - [[Neptune's natural satellites|13 moons]]
25: ... such as [[asteroid]]s, [[comet]]s, and [[trans-Neptunian object]]s; and major (or true) planets. [[Is...
29: ... [[gas]]eous material: Jupiter, Saturn, Uranus, Neptune. Uranian planets, or ice giants, are a sub-cla...
32: ...ound. Given recent discoveries of many [[trans-Neptunian object]]s which are very similar to Pluto in... - History of science (41710 bytes)
4: The [[Scientific Revolution]] saw the inception of the modern [[scientific method]] to guide t...
6: ...cience|natural]] and the [[social science]]s attempt to base their [[theory|theories]] on established ...
19: ...ristotle.jpg|thumb|120px|right|[[Aristotle]] (sculpture)]]
54: ...ed an important role. During this period the concepts of [[citation]] and [[peer review]] were develop...
61: ...n]] questioned religious doctrine. The works of [[Ptolemy]] (Astronomy), [[Galen]] (Medicine), and [[A... - Johannes Kepler (17038 bytes)
15: ...t the Protestant school in Graz, Austria. He accepted the position in April of [[1594]], at the age o...
21: In October [[1604]], Kepler observed the [[supernova]] which was subsequently named [[Kepler's Star]]....
27: ... She was released in October [[1621]] after attempts to convict her failed. Even though she was subj...
40: ...e universe was created, there were no numbers except the Trinity, which is God himself… For, th...
46: ...Kepler's Star]] or [[Supernova 1604]]. No further supernovae have since been observed with certainty in the [... - Tycho Brahe (17516 bytes)
8: Tycho Brahe was born '''Tyge Brahe''', adopting the Latinised form Tycho at around age fifteen...
10: ...not lead to any disputes nor did his parents attempt to get him back. Tycho lived with his childless u...
12: ...s de Sphaera, [[Apianus]]' Cosmographia seu descriptio totius orbis and [[Regiomontanus]]' De triangul...
33: ...new" star. (We now know that Tycho's star was a [[supernova]].) This discovery was decisive for his choice of...
38: ...m]], for the same reasons that he argued that the supernova of 1572 was not near the Earth. He argued that if... - Hubble Space Telescope (50930 bytes)
8: |'''Wavelength regime'''||optical, ultraviolet, near-infrared
45: From its original conception in 1946 until its launch, the project to build...
49: ==Conception, design and aims==
68: ...lite was dropped, and budgetary concerns also prompted collaboration with the [[European Space Agency]...
73: ...ics company Perkin-Elmer to design and build the Optical Telescope Assembly (OTA) and Fine Guidance Se... - Californium (7452 bytes)
59: ...ay have been detected through [[telescope]]s in [[supernova]]e remnants. Californium-249 is formed from the ... - Iron (23778 bytes)
100: <td>2.73 y </td><td>ε capture</td>
129: ...ndard temperature and pressure|STP]] are used except where noted.</font></th>
139: ...er produce sufficient energy in its core, and a [[supernova]] will ensue.
147: ...ulfur and phosphorus, have been reduced to an acceptable level. It has a melting point in the range o...
154: ... of iron come from the [[Sumerian]]s and the [[Egypt]]ians, where around 4000 BC, small items, such as... - Manganese (14965 bytes)
90: ...</td><td>[[1 E5 s|5.591 d]] </td><td>[[electron capture|ε]]</td><td>4.712</td><td><sup>52</sup...
100: ...ndard temperature and pressure|STP]] are used except where noted.</font></th>
119: ...used by the Spartans. Some speculate that the exceptional hardness of Spartan steels derives from the ...
126: ...egrins. The best known manganese-containing polypeptides may be [[arginase]], Mn-containing [[superoxi...
136: ...[manganese nodule]]s on the [[ocean floor]]. Attempts to find economically viable methods of harvestin... - Nickel (13955 bytes)
122: |[[electron capture|ε]]<br />
164: ...ndard temperature and pressure|STP]] are used except where noted.</font>
178: ...goes into superalloys. The remaining 23% of consumption is divided between alloy steels, rechargeable ...
194: ...o two percent. Further, there are Chinese manuscripts suggesting that "white [[copper]]" (e.g. baitung...
196: .... In 1751, Baron Axel Frederik Cronstedt was attempting to extract copper from kupfernickel (now calle... - History of science in early cultures (11033 bytes)
9: ...ntury BC]]: the Mesopotamian cuneiform tablet Plimpton 232 records a number of Pythagorean triplets (3...
16: ...e. Eventually they were miniaturized into the [[diptych]]s and [[astrolabe]]s in use by the Greeks. Th...
20: ==Egyptian==
21: ... also a center of [[Alchemy#Alchemy in Ancient Egypt|alchemy]] research for much of the western world.
23: The [[Egyptian hieroglyph|Egyptian hieroglyphs]], a [[phonetic]] [[writing system... - Star (12279 bytes)
3: ...fusion]] and therefore emits light. All stars except the [[Sun]] appear as shining points in the night...
25: ...nside those clouds triggered by shockwaves from [[supernova]]e. High mass stars powerfully illuminate the clo...
36: ...s that happens on human timescales; historically, supernovae have been observed as "new stars" where none exi...
38: ...to new stars and/or [[planet]]s. The outflow from supernovae and the [[solar wind|stellar wind]] of large sta...
46: ... fall into the [[main sequence]] which is a description of stars based on their [[absolute magnitude]]... - Taurus (constellation) (2696 bytes)
13: ... the [[Crab Nebula]] ([[Messier object|M1]]), a [[supernova]] remnant northeast of Zeta. The explosion, seen ... - Walter Baade (2275 bytes)
26: Along with [[Fritz Zwicky]], he proposed that [[supernova]]e could create [[neutron star]]s.
30: ...pernova of the year [[1054]], and identified the optical counterparts of various [[radio astronomy|rad...
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