mid-2061. Officially designated 1P/Halley, it is also commonly called Comet Halley, or sometimes simply Halley. Halley's periodic returns to the inner Solar
Solar System. The Giotto space probe found that the nucleus of Halley's Comet (1P/Halley) reflects about four percent of the light that falls on it, and
way to a new designation of periodic comets, with the first being named 1P/Halley. To date, there are 440 of these periodic comets, with many more on the