annual parallax

British  

noun

1. See parallax

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Example Sentences

The annual parallax of a star is the angle under which one would see the radius, or half-diameter, of the terrestrial orbit from it.

From Astronomy for Amateurs by Welby, Frances A. (Frances Alice)

German astronomers, Seeliger and others, have long used a stellar unit of distance corresponding to an annual parallax of 0″.2, which has been called a “Siriusweite”.

From Lectures on Stellar Statistics by Charlier, Carl Vilhelm Ludvig

So small a parallax value is of little reliability when it is directly computed from annual parallax observations, but is more trustworthy when derived with the spectroscopic method of Adams.

From Lectures on Stellar Statistics by Charlier, Carl Vilhelm Ludvig

For these reasons Bradley had set up this instrument at Kew, to attempt the proof of the earth’s motion by observing the annual parallax of stars.

From History of Astronomy by Forbes, George

It can further be demonstrated that these ellipses are really circles parallel to the ecliptic; so that we might hastily assume that annual parallax was the cause of the phenomenon discovered by Bradley.

From The Story of the Heavens by Ball, Robert S. (Robert Stawell), Sir