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- South Dakota (14035 bytes)
41: ...[[Montana]]. It is one of the six states of the [[Frontier Strip]].
82: ...the U.S. failed to stop white miners and settlers from entering the region. [[Sitting Bull]] and [[Cr...
125: the papers and obscure from him which he was signing
130: ...est point between the [[Rocky Mountains]] and the French [[Alps]]. More than 70,000 people hike to its...
132: ...no]] Experiment, famous for detecting the [[solar neutrino problem]]. Currently there is pending legislatio... - Astronomy (13970 bytes)
31: ... evolution]]: the study of the evolution of stars from their formation to their end as a stellar remna...
49: In astronomy, [[information]] is mainly received from the detection and analysis of [[electromagnetic...
50: ...on is also carried by [[cosmic ray]]s, [[neutrino|neutrinos]], [[meteor|meteors]], and, in the near future, ...
56: ...to eliminate noise (electromagnetic interference) from the atmosphere.
60: ...UV (ultraviolet) astronomy, as well as studies of neutrinos and cosmic rays. - Sun (20830 bytes)
10: ! align="left" | Mean distance from<br>Earth
21: ! align="left" | Mean distance from<br>[[Milky Way]] core
55: ! align="left" | [[Escape velocity]]<br> from the surface
122: ...onally referred to as '''Sol''' to distinguish it from other "suns". Planet [[Earth]] [[orbit]]s the ...
128: ...istance of about 25,000 to 28,000 [[light-year]]s from the [[galactic centre]], completing one revolut... - History of science (41710 bytes)
6: ...r [[empirical]] [[truth]]. [[Philosophy]] differs from science in that, while both the [[Natural scien...
11: ...fic data is self-evident, value-free, and context-free.
21: ...ccount of the development of (natural) philosophy from ancient times until recent times can be found i...
27: ...rehistoric times, advice and knowledge was passed from generation to generation in an [[oral tradition...
52: ...oration by bringing together people and new ideas from all over the Islamic world. - Cadmium (10755 bytes)
175: *Due to a low [[coefficient of friction]] and very good fatigue resistance, it is u...
181: ...r [[solar cell]]s. [[HgCdTe]] is sensitive to [[infrared]].
183: *Used in the first [[neutrino]] detector.
186: ...nts|discovered]] in [[Germany]] in [[1817]] by [[Friedrich Strohmeyer]]. Strohmeyer found the new ele...
188: ...ighly toxic, the [[British Pharmaceutical Codex]] from 1907 states that [[cadmium iodide]] was used as... - Electron (10516 bytes)
39: ...18(44) [[MeV]]{{inote|http://scienceworld.wolfram.com/physics/ElectronMass.html}}
54: ...rd ''electron'' was coined in 1894 and is derived from the term ''electric'', whose ultimate origin is...
70: ...e vibrations called phonons. When electrons move, free of the nuclei of atoms, and there is a net flow...
74: ...its vicinity, so that the properties one observes from far away are the sum of the bare properties and...
78: ...Note that this is the radius that one could infer from its charge if the physics were only described b... - Neutron (7687 bytes)
32: ...in this unstable form are known as [[Free neutron|free neutrons]]. The same decay method ([[beta deca...
34: ...ristic of neutrons which most differentiates them from other common [[subatomic particle]]s is the fac...
36: ...close indeed to an atomic nucleus. Consequently a free neutron goes on its way unchecked until it make...
38: ...pondingly slowed. Secondary projectiles resulting from these collisions may be detected, for they are ...
40: ...[radioactivity]]. Free neutron beams are obtained from [[neutron source|neutron sources]] by [[neutron... - Physics (25628 bytes)
2: ... contexts, ranging from the sub-nuclear particles from which all ordinary matter is made ([[particle p...
12: The culture of physics research differs from the other sciences in the separation of [[theor...
15: ...mulation of new theories. Likewise, ideas arising from theory often inspire new experiments. In the ab...
34: | [[Boltzmann's constant]], [[Entropy]], [[Free energy]], [[Heat]], [[Partition function (stati...
42: ...lence principle]], [[Four-momentum]], [[Reference frame]], [[Spacetime]], [[Speed of light]] - Star (12279 bytes)
3: ...the [[Earth]]'s [[atmosphere]] and their distance from us. The Sun is also a star, but it is close en...
5: ...on kilometres, or 4.2 [[light year]]s away (light from Proxima Centauri takes 4.2 years to reach Earth...
9: ...]] and [[stellar evolution]].) They range in size from the tiny [[neutron star]]s (which are actually ...
17: ...aviolet and infrared components are typically far from negligible. The apparent [[brightness]] of a st...
25: ... High mass stars powerfully illuminate the clouds from which they formed. One example of such a [[nebu...
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