The comet now known as Halley's Comet has been observed since at least 240 BCE, but it was not known to be something that reappeared periodically. It wasn't until 1705 that English astronomer Edmond Halley determined that it was the same comet that appeared periodically.
As of now, there are no spacecraft missions planned to travel to Halley's Comet. The last time it was visited by a spacecraft was in 1986 by the ESA's Giotto mission. The comet is currently not within reach of any existing spacecraft technology.
The European Space Agency's Rosetta spacecraft was the probe that closely studied a comet's nucleus. It visited Comet 67P/Churyumov–Gerasimenko in 2014 and deployed a lander, Philae, to study the comet's surface.
encke's comet that appears every 3.3 years
Yes, spacecrafts have visited both asteroids and comets. Some notable missions include NASA's OSIRIS-REx which visited the asteroid Bennu and JAXA's Hayabusa2 mission which visited the asteroid Ryugu. Additionally, the European Space Agency's Rosetta mission visited and landed on the comet 67P/Churyumov–Gerasimenko.
Pluto will be visited by the spacecraft New Horizon in 2015
The Giotto spacecraft visited Halley's Comet to take pictures and increase understanding of comets.
The spacecraft Giotto visited Halley's Comet in 1986. It provided valuable data and images of the comet and its nucleus, improving our understanding of these icy bodies in our solar system.
As of now, there are no spacecraft missions planned to travel to Halley's Comet. The last time it was visited by a spacecraft was in 1986 by the ESA's Giotto mission. The comet is currently not within reach of any existing spacecraft technology.
The European Space Agency's Rosetta spacecraft was the probe that closely studied a comet's nucleus. It visited Comet 67P/Churyumov–Gerasimenko in 2014 and deployed a lander, Philae, to study the comet's surface.
encke's comet that appears every 3.3 years
venus was the first planet visited by the American spacecraft
No spacecraft has visited all the planets.
Yes, spacecrafts have visited both asteroids and comets. Some notable missions include NASA's OSIRIS-REx which visited the asteroid Bennu and JAXA's Hayabusa2 mission which visited the asteroid Ryugu. Additionally, the European Space Agency's Rosetta mission visited and landed on the comet 67P/Churyumov–Gerasimenko.
Pluto will be visited by the spacecraft New Horizon in 2015
comet sandy
As of 2021, spacecraft have studied five comets up close: Halley's Comet (by the European Space Agency's Giotto spacecraft), Comet Borrelly (by NASA's Deep Space 1), Comet Wild 2 (by NASA's Stardust spacecraft), Comet Tempel 1 (by NASA's Deep Impact spacecraft), and Comet 67P/Churyumov-Gerasimenko (by the European Space Agency's Rosetta spacecraft).
The Russians have never landed on the moon