what satellite or robot explored Saturn
the rover and rover two
cassinni
pioneers explored pluto
everything sucks
Mariner 10 and Messenger.
No spacecraft has ever landed on Mercury. A couple have orbited around the planet.
From what I have learned, there has not yet been a robot that explored Mercury from closeup. They see Mercury since it is able to be seen by the naked eye in certain times of the night and day. It can also be seen with a telescope. So in all: There has not yet been a robot to explore Mercury from what I know. I apologize if this is incorrect.
A satellite is a Space Robot?
The satellite or robot that explored Earth close up is the Earth Observing System (EOS) by NASA. These satellites collect data on various aspects of Earth, such as weather patterns, climate changes, and environmental phenomena.
The New Horizons spacecraft explored Pluto. It launched in 2006 and conducted a flyby of Pluto in 2015, providing the first detailed images and data of the distant dwarf planet.
Mercury was explored by no one only observed.