We knew him now, of course: it was that variable star, our old acquaintance, Mr. Higginson the courier.
Mira, (Omicron Ceti,) in the neck of the Whale, is a variable star.
The law of change in a variable star is represented to the eye by a curve in the following way.
The variable star Argus also belongs to the constellation Carina.
What does your wisdom make of that wandering and variable star behind those apple boughs?'
The sun's spots may suffice to make it a variable star with a period of 11 years.
Beta Cephei is a variable star in the Constellation Cepheus.
For the other leading type of variable star, Algol, of which mention has already been made, is the best instance.
The variable star Mira Ceti was observed, and a long series of lunar observations begun.
The observations made by Hevelius on the variable star named by him “Mira” are included in Annus climactericus.
|variable star |
A star whose actual or observed brightness varies periodically. These changes can occur with varying degrees of regularity and intensity, over times ranging from a fraction of a second to many years. Intrinsic variation occurs because of changes of the star itself, often due to internal vibration or eruptions, or to influx of nearby material. Cepheids and novae are examples of intrinsically variable stars. Extrinsic variation in a star's observed brightness that does not reflect physical changes in the star also occur, as when a darker star periodically eclipses a brighter star in an eclipsing binary system, or with the rotation of a star.