Starting our inquiry from another direction, we can try to form an estimate by considering the question of proper motions.
These evidences of movement are known as "proper motions," that is to say, actual motions in space proper to the stars themselves.
Auwers in 1882, form the true basis of exact astronomy, and of our knowledge of proper motions.
They have besides "proper motions," detected in 1718 by E.
Two methods are available for our estimate--measures of parallax and determination of proper motions.
The general outcome of researches on proper motions tends to strengthen the conclusions that the Keplerian sphere, if I may use this expression, has no very well marked existence.
Further, the actual rate of proper motions, so far as regards that part of them which is projected upon the sphere, can be ascertained for stars at known distance.
By a more searching analysis of a smaller collection of proper motions, Herschel succeeded in rendering apparent the very consequences foreseen by Mayer.
The community of proper motions detected by Mädler in the vicinity of the Pleiades may accordingly possess a significance altogether different from what he imagined.
Proper motions," if this be so, are of a subordinate kind; they are indexes simply to the mechanism of particular aggregations, and have no definable connection with the mechanism of the whole.
Boss broke ground in this direction by investigating 284 proper motions, few of which had been similarly employed before (Astr.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "proper motions" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
