It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Officially designated 1P/Halley, it is also commonly called Comet Halley, or sometimes simply Halley.

Jan 21, 2026 · Halley’s Comet, the first comet whose return was predicted and, almost three centuries later, the first to be imaged up close by interplanetary spacecraft. In 1705 English astronomer …

Halley is often called the most famous comet because it marked the first time astronomers understood comets could be repeat visitors to our night skies. Astronomers have now linked the comet's …

Sep 17, 2024 · Halley’s Comet, officially designated 1P/Halley, is a short-period comet (less than 200-year orbit around the Sun) that is regularly visible from Earth about every 76 years.

Explore the rich history of Halley's Comet, from ancient observations to modern scientific understanding. Learn about its most famous appearances throughout history.

Nov 8, 2016 · Halley argued that the comet orbited the sun and whizzed by the Earth roughly once every 76 years, and he predicted that it would reappear sometime in late 1758 or early 1759.

Sep 16, 2025 · Using Sir Isaac Newton's laws of motion, Halley observed the similar orbits of comets from 1531, 1607, and 1682, accurately predicting they were the same object and would return in 1758.

Nov 3, 2024 · Halley is often called the most famous comet because it marked the first time astronomers understood comets could be repeat visitors to our night skies. Astronomers have now linked the …

Jan 10, 2026 · Edmond Halley was an English astronomer and mathematician who was the first to calculate the orbit of a comet later named after him. He is also noted for his role in the publication of …

Track the real-time countdown to Halley's Comet next appearance in 2061. The definitive source for information about the most famous comet in history.