Space & Universe on Instagram: "Halley’s comet ☄️ is one of the most famous celestial objects in human history-and for good reason. It’s a short-period comet that returns to Earth’s skies roughly every 76 years, making it visible multiple times in a single human lifetime. • Last seen from Earth in 1986, it will return in 2061. • It’s the only known comet that can appear twice in a person’s lifetime. • When it approaches the Sun, solar heat vaporizes its icy surface, forming a brilliant tail that