(in ancient and medieval astronomy) a transparent sphere of the heavens postulated to lie between the fixed stars and the primum mobile and to account for the precession of the equinox and other motions.
〈史〉（古代及中世纪天文学所说的）结晶球体（据认为位于恒星和第十层天之间，以说明岁差及其他运动）
Example sentencesExamples
In 1618, he observed three comets pass effortlessly through Ptolemy's crystalline spheres (in which the planets and stars supposedly moved around the Earth), showing that these spheres must be imaginary.
Peurbach believed that the planets were in solid crystalline spheres although he believed that their motions were controlled by the Sun.
Aristotle's view of the world was based on a spherical Earth round which there were crystalline spheres which carried the Sun, Moon and planets.
Plato's beliefs as regards the universe were that the stars, planets, Sun and Moon move round the Earth in crystalline spheres.
That cosmology had the Earth surrounded by a hard crystalline sphere upon which were suspended the stars.
Definition of crystalline sphere in US English:
crystalline sphere
noun
historical
(in ancient and medieval astronomy) a transparent sphere of the heavens postulated to lie between the fixed stars and the primum mobile and to account for the precession of the equinox and other motions.
〈史〉（古代及中世纪天文学所说的）结晶球体（据认为位于恒星和第十层天之间，以说明岁差及其他运动）
Example sentencesExamples
Aristotle's view of the world was based on a spherical Earth round which there were crystalline spheres which carried the Sun, Moon and planets.
That cosmology had the Earth surrounded by a hard crystalline sphere upon which were suspended the stars.
Plato's beliefs as regards the universe were that the stars, planets, Sun and Moon move round the Earth in crystalline spheres.
In 1618, he observed three comets pass effortlessly through Ptolemy's crystalline spheres (in which the planets and stars supposedly moved around the Earth), showing that these spheres must be imaginary.
Peurbach believed that the planets were in solid crystalline spheres although he believed that their motions were controlled by the Sun.