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- Astronomy (13970 bytes)
3: ...ed near the center of the [[Far side (Moon)|far side]] of Earth's Moon, its diameter is about 58 miles...
5: ...d with [[astrology]], which assumes that people's destiny and human affairs in general are correlated ...
8: ...rns itself much more with trying to observe and understand the actual physical nature of celestial obj...
10: ... and involves working with computer or analytic models.
12: ...er ways. Categorization by the region of space under study (e.g., Galactic astronomy, Planetary Scien... - Isaac Newton (23339 bytes)
2: ...fried Leibniz|Gottfried Wilhelm Leibniz]] for the development of differential [[calculus]]. While they...
4: ...a prism was inherent in the white light and not added by the prism as [[Roger Bacon]] had claimed in t...
6: ...ped a [[Newton's law of cooling|law of cooling]], describing the rate of cooling of objects when expos...
12: ...ief biography of Newton's early life. For more in-depth information, see [[Isaac Newton's early life a...
14: ... said that his body at that time can even fit inside a quart mug. His father had died three months bef... - Albert Einstein (43065 bytes)
3: ... and [[physical cosmology|cosmology]]. He was awarded the [[1921]] [[Nobel Prize in Physics|Nobel Priz...
5: ...or a scientist. In his later years, his fame exceeded that of any other scientist in [[history of scie...
7: ... day Einstein receives popular recognition unprecedented for a scientist.
14: ...y was [[Jew]]ish (and non-observant); Albert attended a [[Catholic school|Catholic elementary school]]...
16: ...ct. Another, more recent, theory about his mental development is that he had [[Asperger's syndrome]], ... - Atom (12300 bytes)
1: {| border="1" cellspacing="0" align="right" cellpadding="2...
7: | align="center" | '''Helium atom model (not to scale)'''<br>Showing nucleus with two pr...
43: ...or example, technetium and californium have been identified in supernovae.
48: ...her types of chemical compounds. Molecules are made up of multiple atoms; For example, a molecule of ...
50: ...on quantum effects, such as in [[Bose-Einstein condensate]]. - 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== - Ionosphere (19365 bytes)
8: ...alance between these two processes determines the degree of ionization present at any given time.
10: ...e also mechanisms that disturb the ionosphere and decrease the ionization. There are disturbances suc...
14: ...imum solar activity. With an active sun electron density values are a factor of 10 higher.]]
19: ...] of 121.5 [[nanometre]](nm) ionizing [[nitric oxide]] (NO). In addition, when the sun is active with...
22: ...ow far it can reflect radio waves. On the night side of the Earth, the solar wind drags the ionosphere... - Hydrogen (20221 bytes)
3: <table border="1" cellpadding="2" cellspacing="0" align="right...
5: <table align="center" border="0">
22: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td>...
34: <td>[[van der Waals radius]] </td><td>...
40: <td>[[Oxidation state]]s ([[Oxide]]) </td><td>1 ([[amphoteric]])</t... - Electron (10516 bytes)
1: {| border="1" cellspacing="0" align="right" cellpadding="2...
5: ...wn as cross-sections with color-coded probability density</small>]]
10: {| align="center" border="0"
30: {| border="0"
54: ... The word ''electron'' was coined in 1894 and is derived from the term ''electric'', whose ultimate o... - History of chemistry (8174 bytes)
3: ...|thumb|150px|left|Chemistry Clipart .Clipart provided by
6: ==The vitalism debate and organic chemistry==
8: ...], and other synthetic [[dye]]s, as well as the widely used drug [[aspirin]]. The discovery also contr...
12: ...planation of [[Brownian motion]] in the first decade of the [[20th century]].
14: ... the atom as a branch of [[physics]], but was awarded the [[Nobel Prize]] in chemistry, not physics, f... - Matter (1902 bytes)
1: ...he [[four fundamental forces]], are thus not considered matter, even though they certainly have [[ener...
3: ...periodic table]]. Usually these nuclei are surrounded by a cloud of [[electron]]s. A nucleus with as m...
5: ...] and [[temperature]], such as [[Bose-Einstein condensate]]d, [[superfluid]]ic, [[liquid]], [[fluid]]i...
10: *[[Particle physics]], which provides a bit of historical background - Color (30968 bytes)
4: ...ealth English]]) is a sensation which (in humans) derives from the ability of the [[cone cell|fine str...
9: <table border="0" cellspacing="0" cellpadding="2">
46: [[Image:Spectrum441pxWithnm.png]]<br><small>''Designed for monitors with [[gamma correction|gamma]...
59: <table border="0" cellspacing="0" cellpadding="2">
143: ...sation, although any such definition would vary widely among different species and also somewhat among... - Solar cell (27643 bytes)
1: ... consisting of a large-area [[p-n junction]] [[diode]], which, in the presence of [[sunlight]] is capa...
5: ...r_cell.png|thumb|250x|right|A '''solar cell''', made from a poly-crystalline silicon wafer]]
15: ...2662&RS=PN/2402662 US2402662], "''Light sensitive device''"). Sven Ason Berglund had a prior patent co...
19: ... electric power output to the light power input. Ideally, near the equator at noon on a clear day, the...
21: ...rial for solar cells (and all other semiconductor devices) is crystalline [[silicon]]. Crystalline sil... - Electric field (1958 bytes)
1: ...s and contain [[electrical energy]] with [[energy density]] proportional to the square of the field in...
7: ...ing to Equation (1) above, electric field is dependent on position. The electric field due to any sin...
13: If this principle is extended to an infinite number of infinitesimally small e...
19: where ρ is the [[charge density]], or the amount of charge per unit [[volume...
22: ... [[solid]], an [[electric field gradient]] may be defined.
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