The first of two spacecraft to visit the planet was Mariner 10, which has mapped about 45% of the planet's surface from 1974 to 1975. The second is the MESSENGER spacecraft from NASA, which mapped another 30% during his trip to Mercury January 14, 2008. MESSENGER is now in orbit around Mercury to complete the mapping.
it has neither. also there are no man made orbiting spacecrafts.
Venus has no natural satellites but probes have been sent their for many years now.
Spacecrafts studying Mercury have revealed a variety of fascinating findings. Some notable discoveries include its heavily cratered surface, presence of water ice in permanently shadowed craters, a large iron core contributing to its strong magnetic field, and extreme temperature variations with highs of over 800 degrees Fahrenheit.
saturn has only been visited 4 times by spacecrafts
As of 2021, only two spacecraft have visited Mercury: Mariner 10, which flew by three times in the 1970s, and MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging), which orbited the planet from 2011 to 2015. The European Space Agency's BepiColombo mission is currently en route to Mercury as well.
mariner 10 and MESSENGER
Messenger
Planets that have been visited by spacecrafts include Mars, Venus, Mercury, Jupiter, Saturn, Uranus, and Neptune. Additionally, the spacecraft Voyager 2 has conducted flybys of both Uranus and Neptune.
By the space race
Although several spacecrafts have been sent to Venus, no alien spacecrafts have been discovered on its surface.
You seem to be misinformed. The first US spacecraft was Mariner 10. This was followed by Messenger. There have not been others.
Mariner 10 and MESSENGER.
it has neither. also there are no man made orbiting spacecrafts.
Venus has no natural satellites but probes have been sent their for many years now.
Spacecrafts studying Mercury have revealed a variety of fascinating findings. Some notable discoveries include its heavily cratered surface, presence of water ice in permanently shadowed craters, a large iron core contributing to its strong magnetic field, and extreme temperature variations with highs of over 800 degrees Fahrenheit.
Venus has acid that melts metal. It is also hotter than Mercury because of Venus's clouds.
one have through 2009. It's name is Voyager 2