noun, plural per·i·he·li·a [per-uh-hee-lee-uh, -heel-yuh] /ˌpɛr əˈhi li ə, -ˈhil yə/. Astronomy.
Origin of perihelion
Examples from the Web for perihelion
I'm not trying to calculate the perihelion of Jupiter or do 3D renderings of the National Cathedral.
Each time the comet comes back to perihelion in two and a half hours less than on the former occasion.
If the comet be a periodic one, the same series of changes may take place at its next return to perihelion.
It has its perihelion near the orbit of the earth, and its aphelion a little beyond that of Jupiter.
The comet arrived at its perihelion on the thirteenth of March, only twenty-three days from the time assigned by Clairaut.
Its abrupt display of vitality occurred two full months after perihelion.A Popular History of Astronomy During the Nineteenth Century|Agnes M. (Agnes Mary) Clerke
British Dictionary definitions for perihelion
noun plural -lia (-lɪə)
Word Origin for perihelion
Word Origin and History for perihelion
"point at which a celestial body is nearest the Sun," 1680s, coined in Modern Latin (perihelium) by Kepler (1596) from Latinizations of Greek peri "near" (see peri-) + helios "sun" (see sol). Subsequently re-Greeked.