こゆううんどう
固有運動
1. proper motionAstronomy
2. Proper motionThe proper motion of a star is its angular change in position over time as seen from the center of mass of the solar system. It is measured in seconds of arc per year, arcsec/yr, where 3600 arcseconds equal one degree. This contrasts with radial velocity, which is the time rate of change in distance toward or away from the viewer, usually measured by Doppler shift of received radiation.
Read “Proper motion” on English Wikipedia
Read “固有運動” on Japanese Wikipedia
Read “Proper motion” on DBpedia
Read “Proper motion” on English Wikipedia
Read “固有運動” on Japanese Wikipedia
Read “Proper motion” on DBpedia
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