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| ==Origin== | | ==Origin== |
| New Latin ''trajectoria'', from [[feminine]] of ''trajectorius'' of passing, from [[Latin]] ''traicere'' to cause to cross, cross, from ''trans''-, ''tra''- trans- + ''jacere'' to throw | | New Latin ''trajectoria'', from [[feminine]] of ''trajectorius'' of passing, from [[Latin]] ''traicere'' to cause to cross, cross, from ''trans''-, ''tra''- trans- + ''jacere'' to throw |
− | *[http://en.wikipedia.org/wiki/17th_century 1696] | + | *[https://en.wikipedia.org/wiki/17th_century 1696] |
| ==Definitions== | | ==Definitions== |
| *1: the curve that a body (as a [[planet]] or [[comet]] in its orbit or a rocket) describes in [[space]] | | *1: the curve that a body (as a [[planet]] or [[comet]] in its orbit or a rocket) describes in [[space]] |
| *2: a [[path]], [[progression]], or line of development resembling a physical trajectory <an upward career trajectory> | | *2: a [[path]], [[progression]], or line of development resembling a physical trajectory <an upward career trajectory> |
| ==Description== | | ==Description== |
− | A '''trajectory''' is the [[path]] that a moving object follows through [[space]] as a [[function]] of [[time]]. The object might be a [http://en.wikipedia.org/wiki/Projectile projectile] or a [[satellite]], for example. It thus includes the [[meaning]] of [[orbit]]—the path of a [[planet]], an asteroid or a [[comet]] as it travels around a central mass. A trajectory can be described [[mathematically]] either by the [[geometry]] of the [[path]], or as the position of the object over [[time]]. | + | A '''trajectory''' is the [[path]] that a moving object follows through [[space]] as a [[function]] of [[time]]. The object might be a [https://en.wikipedia.org/wiki/Projectile projectile] or a [[satellite]], for example. It thus includes the [[meaning]] of [[orbit]]—the path of a [[planet]], an asteroid or a [[comet]] as it travels around a central mass. A trajectory can be described [[mathematically]] either by the [[geometry]] of the [[path]], or as the position of the object over [[time]]. |
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− | In [http://en.wikipedia.org/wiki/Control_theory control theory] a trajectory is a time-ordered set of states of a [http://en.wikipedia.org/wiki/Dynamical_system dynamical system] (see e.g. [http://en.wikipedia.org/wiki/Poincar%C3%A9_map Poincaré map]). [http://en.wikipedia.org/wiki/Trajectory] | + | In [https://en.wikipedia.org/wiki/Control_theory control theory] a trajectory is a time-ordered set of states of a [https://en.wikipedia.org/wiki/Dynamical_system dynamical system] (see e.g. [https://en.wikipedia.org/wiki/Poincar%C3%A9_map Poincaré map]). [https://en.wikipedia.org/wiki/Trajectory] |
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| [[Category: Physics]] | | [[Category: Physics]] |