Halley's comet takes 76 years to pass by Earth. This comet is an example of a short-period comet, one whose orbit is influenced by the gravities of the outer planets of the solar system and so usually stays within the area of the planets.Continue Reading
Halley's comet comes as close to the sun as 88 million kilometers, which is closer than the orbit of Earth. Its farthest distance from the sun is 5.2 billion kilometers, which reaches even beyond the orbit of Neptune.
Edmund Halley used Isaac Newton's theory of gravitation to conclude that the comets that made appearances in 1531, 1607 and 1682 were actually the same comet. He then used the theory to predict that this same comet would appear again in 1742, and it did, although Halley did not live to see the comet's reappearance.Learn more about Comets & Asteroids
Scientists predict that Halley's Comet, also known as Comet Halley, will make an appearance again in late 2061, early 2062. It was last seen in the sky in 1986.Full Answer >
Edmond Halley was not the first scientist to observe Halley's Comet, but he discovered that recorded comet sightings in 1531, 1607 and 1682 were part of a recurring orbital cycle, according to Encyclopaedia Britannica. He published his findings in 1705 and correctly predicted the comet's next appearance in 1758.Full Answer >
Halley's Comet is named after the English astronomer Edmund Halley. Although not the first person to observe the comet, Halley was the first person to recognize that the comet returned to the Earth after a set interval, calculated as every 76 years.Full Answer >
Halley's comet has a mean diameter of 11 kilometers across. On average, it passes by Earth between every 75 to 76 years. In 1910, Halley's comet came as close as 13.9 million miles.Full Answer >