annual parallax in a sentence
1) Measurement of annual parallax was the first reliable way to determine the distances to the closest stars.
annual collocations
2) The parsec (3.26 light-years) is defined as the distance for which the annual parallax is 1 arcsecond.
3) The annual parallax of a star is a very slight apparent wobble caused by Ea rth's orbital motion around the Sun.
annual parallax example sentences
4) In 1669 Robert Hooke sought to measure the annual parallax of the star gamma Draconis, and thus to prove the Copernican theory of an orbiting Earth.5) In the Copernican theory, the stars had to lie at vast distances from Earth in order to explain why no annual parallax was seen among them.
6) Annual parallax is normally measured by observing the position of a star at different times of the year as the Earth moves through its orbit.
7) Based upon an annual parallax shift of 88.83 milliarc seconds as measured by the Hipparcos satellite, Arcturus is from Earth-relatively close in astronomical terms.
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