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Parallactic Proper Motion DocumentsThis material has 2 associated documents. Select a document title to view a document's information. Main DocumentParallactic Proper Motion
written by
Todd Timberlake The EJS Parallactic Proper Motion Model illustrates the phenomenon known as parallactic proper motion. Proper motion refers to the progressive (non-oscillatory) apparent motion of a star relative to more distant background stars. If this apparent motion is due to actual motion of the star through space then it is known as "true proper motion." However, this apparent motion can also be due to the motion of Earth (along with the Sun and the rest of the solar system) through space. This motion is known as "parallactic proper motion." In 1783 William Herschel detected parallactic proper motion in several stars and used these motions to determine that the solar system was moving toward a point called the "Solar Apex" in the constellation Hercules.
Published May 17, 2011
This file is included in the full-text index. Source Code DocumentsParallactic Proper Motion Source CodeThe source code zip archive contains an XML representation of the EJS Parallactic Proper Motion Model. Unzip this archive in your EJS workspace to compile and run this model using EJS.
Released under a This material is released under the GNU General Public License Version 3.
Published May 17, 2011
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