there were about 7 missions to mercury
There were 2: Mariner 10 and MESSENGER. Both are inactive now.
All of the Mercury missions ended (as did all missions prior to the Shuttle Program) via capsule splashdown and recovery by a Navy carrier in the Pacific Ocean.
There have been no manned missions to Mercury.
No Apollo missions landed people on the moon.
aliens
Mercury.
nothin
Mercury has very little atmosphere to stop impacts and it is covered with craters.
Yes there was a mission called U-N 98 to mercury in 1976. Two people were aboard and they had gotten close to mercury and bursted into flames. Both died, bodys never found.
Mercury used to have river valleys, but now they are old and dried-up.
Mercury has only been explored by space probes, specifically Mariner 10 in 1973, and MESSENGER in 2004. Unrelated to the planet are the Mercury spy satellite program of the 1990s, and the 1959-1963 human spaceflight program Project Mercury.