Mariner 10
There were two: Mariner 10 and Messenger.
The one man spacecraft was called the Mercury .
Mercury.
The First spacecraft was the MESSENGER. The First spacecraft was the MESSENGER.
Redstone.
None. Mercury was discovered before spacecraft were invented.
The first spacecraft to visit Mercury was Mariner 10 in 1974 -> 1975
Gemini. Mercury had one astronaut at a time, Gemini had two, and Apollo had three.
'MESSENGER' is the Mercury Mission - See the related link listed below for more information:
they found mercury at the LOST AND FOUND!
Mercury Friendship 7 (John H. Glenn, USA) was the first spacecraft to orbit the Earth three times.
The Apollo 11 was a bigger spacecraft ,then mercury or Gemini spacecraft.