New Horizons' July 2015 Pluto flyby at 49,600 km/h revealed nitrogen glaciers and the heart-shaped Tombaugh Regio — then pushed on to Kuiper Belt object Arrokoth.
Voyager 1 and 2 launched in 1977 on a Grand Tour that comes once every 176 years. How they mapped Jupiter, Saturn, Uranus and Neptune — and carried the Golden Record.
Ion engines produce the thrust of a sheet of paper but crossed billions of kilometers on Dawn, DART, and Psyche — how Hall-effect and VASIMR thrusters actually work.
NASA's Psyche spacecraft launched in Oct 2023 for asteroid 16 Psyche — a metal world that may be a dead planet's core. Hall-effect thrusters, arrival in 2029, and the science.
