For the other leading type of variable star, Algol, of which mention has already been made, is the best instance.
The theory in question will, however, apparently account for only one class of variable star, namely, that of which Mira Ceti is the best-known example.
So, too, the length of the period fluctuates in many cases, as does every other circumstance connected with it, and predictions of what such a variable star will do are notoriously unreliable.
The sun's spots may suffice to make it a variable star with a period of 11 years.
This object was the earliest known case of a variable star, except the so-called temporary stars, to which we shall presently refer.
If the sun were withdrawn from us to the distance of Nova Cygni, it would seemingly have dwindled down to an object not more brilliant than the variable star.
Now it is evident that a spectroscopic binary, if the plane of its motion made a very small angle with the line of sight, would be a variable star.
The facilities thus offered for continuous photographic research rendered feasible Professor Bailey's amazing discovery of variable star-clusters.
The easiest way to account for it, if not the most satisfactory, is to assume that it is a variable star of long period, and possessing a very wide range of variability.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "variable star" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
