perihelion
- n periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
- Yes, there is a world championship, and every four years the perihelion of the Olympics.
- In 1977 Ashley reached the perihelion when Balanchine choreographed the first of two ballets for her, Ballo della Regina.
- It will be ordered to aim its ultraviolet spectrometer toward the comet before, during and after perihelion, when Halley's is most active because of its proximity to the sun.