No spacecraft was needed in order to discover the planet Mercury.
It's a "naked eye" object, and has been known as a morning-star/evening-star
since ancient times.
None. Mercury was discovered before spacecraft were invented.
The first spacecraft to visit Mercury was Mariner 10 in 1974 -> 1975
they found mercury at the LOST AND FOUND!
The First spacecraft was the MESSENGER. The First spacecraft was the MESSENGER.
The one man spacecraft was called the Mercury .
The Apollo 11 was a bigger spacecraft ,then mercury or Gemini spacecraft.
Mercury.
NOPE
Mariner 10 and MESSENGER flew past Mercury.
Gemini
Redstone.
Juan Alejandro