It is the part of physical astronomy to explain the causes of these phenomena, by investigating the general laws on which they depend; especially, by tracing out all the consequences of the law of universal gravitation.
Descriptive astronomy respects facts; physical astronomy, causes; practical astronomy, the means of investigating the facts, whether by instruments or by calculation.
Since Professor Grant's invaluable work on the History of Physical Astronomy was published, a third of a century has elapsed.
Hansen undertook that quest, which has terminated in the discovery of his two new lunar inequalities, the most remarkable discovery, I think, in Physical Astronomy.
Mathematical Tracts on Physical Astronomy, the Figure of the Earth, Precession and Nutation, and The Calculus of Variations.
Quoted by Grant in History of Physical Astronomy, p.
Grant, however, in his History of Physical Astronomy, calls Simon Marius an "impudent pretender"!
There is an excellent account of the whole matter in Professor Grant's[805] History of Physical Astronomy.
The discoveries which this volume records form the basis of physical astronomy.
They were very seldom used, and we must regard the circumstances which disqualified Kepler for an observer, as highly favourable to the developement of those great powers which he directed with undivided energy to physical astronomy.
But a perception of the uniformity and perpetuity of motion lies at the very basis of physical astronomy.
This immortal work not only laid the foundation of Physical Astronomy, it also carried the structure thereof very far toward its completion.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "physical astronomy" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
