the.com/perihelion
the moment Earth snuggles closest to the sun, smack in the dead of winter
January thingEarth reaches it in early January, hemispheres be damned
Not the reasonSeasons come from tilt, not this 3-million-mile swing
Speed boostPlanets move fastest at perihelion, slowest at aphelion
Mercury's tattleIts shifting perihelion helped prove Einstein right
Name rootsGreek for around-the-sun, coined by Kepler era