Perihelion: Part 1

pɛrɪˈhiːlɪən perihelion: that point in the orbit of a planet, comet or other body at which it is closest to the sun Not to be confused with the parhelion, which I wrote about last month. Today (4 January 2017), the Earth is at perihelion, its closest to the sun, a mere 98% of its average … Continue reading Perihelion: Part 1 →