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Lightning.

A physical phenomenon is a phenomenon that is describable by physics and involved with some form of matter, energy, or spacetime. Physical phenomena are usually regarded as, at least in theory, subjects of observation - Niels Bohr, one of the founding fathers of quantum mechanics, is quoted as saying "no phenomenon is a phenomenon until it is an observed/observable phenomenon." Wikipedia does not have an article with this exact name. ... A phenomenon (Greek: , pl. ... Image File history File links Download high resolution version (1327x1200, 117 KB)Lightning over Pentagon City in Arlington, Virginia. ... Image File history File links Download high resolution version (1327x1200, 117 KB)Lightning over Pentagon City in Arlington, Virginia. ... A phenomenon (Greek: , pl. ... This is a discussion of a present category of science. ... In physics, matter is commonly defined as the substance of which physical objects are composed, not counting the contribution of various energy or force-fields, which are not usually considered to be matter per se (though they may contribute to the mass of objects). ... For other uses of this term, see Spacetime (disambiguation). ... Observation is an activity of a sapient or sentient living being (e. ... Niels (Henrik David) Bohr (October 7, 1885 – November 18, 1962) was a Danish physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in 1922. ... Founding Fathers are persons instrumental not only in the establishment (founding) of a political institution, but also in the origination of the idea of the institution. ... Fig. ...

Phenomena are usually associated with change, but not necessarily immediately visible change. One of the goals of physics is to group phenomena into classes with common causes and patterns. For example, Isaac Newton observed that while an apple might fall from a tree, and the moon, very large and massive, does not fall from the sky, both phenomena are caused by gravity. A related observation, made by Johannes Kepler after painstaking observations, was that the planet Mars also travels in an elliptical orbit due to gravity. Another related observation, first made by James Bradley, an astronomer, is that by carefully plotting the position of a nearby star it appears to move in an ellipse over the course of a year. This article does not cite any references or sources. ... Sir Isaac Newton FRS (4 January 1643 – 31 March 1728) [ OS: 25 December 1642 – 20 March 1727][1] was an English physicist, mathematician, astronomer, natural philosopher, and alchemist. ... Gravity is a force of attraction that acts between bodies that have mass. ... Johannes Kepler (December 27, 1571 – November 15, 1630) was a German mathematician, astronomer and astrologer, and a key figure in the 17th century astronomical revolution. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... Elliptical may refer to: Ellipse: a shape and mathematical construct Elliptical trainer: an exercise machine This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... James Bradley (March 1693 – July 13, 1762) was an English astronomer, Astronomer Royal from 1742. ... For other uses, see Astronomy (disambiguation). ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... For other uses, see Ellipse (disambiguation). ...

See also

• Physical system
• Philosophy of physics
• Physicalism

A physical system is a system that is comprised of matter and energy. ... Philosophy of physics is the study of the fundamental, philosophical questions underlying modern physics, the study of matter and energy and how they interact. ... The term physicalism was coined by Otto Neurath, in a series of early 20th century essays on the subject, in which he wrote According to physicalism, the language of physics is the universal language of science and, consequently, any knowledge can be brought back to the statements on the physical...

References

• Jeremy Bernstein, A Theory for Everything, Copernicus, An imprint of Springer-Verlag, New York, 1996, hardback, ISBN 0-387-94700-0