Mariner 10, in 1974-1975 and Messenger from 2008 until it was crashed into Mercury in 2015.
No spacecraft has ever landed on Mercury. A couple have orbited around the planet.
the name of the first spacecraft to first observe venus was venera 3. The year it observed venus 1962.
87.97 days. A Mercury Year.
Mariner 10 and Messenger have visited Mercury. BepiColombo by the ESA is planned to be launched in 2013. Mariner 10 provider the first close up photos of the planet. Messenger is "filling" in the gaps not accomplished by Mariner.
88 earth days * * * * * Actually, that is a Mercury year! A mercury day is 58.64 earth days.
No spacecraft has ever landed on Mercury. A couple have orbited around the planet.
yes, MESSENGER has explored Mercury. On March 18, 2011 a year from today, MESSENGER will transition from orbiting the Sun to being the first spacecraft ever to orbit the planet Mercury.
At the fastest current spacecraft speed (other than re-entry from the Moon), which is about 60000 km/hr, it would take at least 100 days to reach Mercury, depending on its position in its orbit. It could take as long as 120 days.Most space probes do not accelerate constantly, but use planetary gravity effects to speed up or slow down, which involves long, complex orbits taking a year or more. In this case, a spacecraft actually has to decelerate from the Earth's orbital speed (about 107,000 km/hr) to reach Venus or Mercury.
the name of the first spacecraft to first observe venus was venera 3. The year it observed venus 1962.
The first pictures were taken by NASA's MESSENGER spacecraft in 2011.http://www.space.com/11952-latest-photos-mercury-nasa-messenger-probe-part2.html
Mercury take around 87.97 days to make one orbit of the sun, about 3 Earth months for one year on Mercury.
87.97 days. A Mercury Year.
Mariner 10 and Messenger have visited Mercury. BepiColombo by the ESA is planned to be launched in 2013. Mariner 10 provider the first close up photos of the planet. Messenger is "filling" in the gaps not accomplished by Mariner.
Viking 1 took photos of mercury in 1983!
88 earth days * * * * * Actually, that is a Mercury year! A mercury day is 58.64 earth days.
A Mercury 'year' is 88 earth days.
Mercury takes 88 Earth days for one revolution (orbit) around the Sun (a Mercury "year").