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单词 θ207
释义
the world > the universe > heavenly body > movement of heavenly bodies > [adjective] > movement in orbit > parts of orbit (5)
perihelian1690

Of or relating to the perihelion of a planet, comet, etc.

aphelian1739

Of or pertaining to the aphelion; farthest from the sun.

perihelial1785

= perihelian, adj.

periastral1872

Of or relating to a periastron.

pericentric1888

Astronomy. Of or relating to a pericentre. rare before late 20th cent.

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