The Moon since NASA was in the US
No person has ever 'explored' any planet, besides Earth. Several people have been to the moon. Unmanned vehicles have been to Mars. Mankind has only 'explored' other planets visually.
Galileo
Most famously, it was voyager 1 and 2 that explored these outer gas planets and have given us so much information. Other probes have been sent to these gas giants, but these are the the probes that visited all four gas giants between them.
It isn't clear what you mean with "it".
as far o what in aware of they have only gone to the moon, but have sent robots to vistet oher planets. i
It has never been explored by humans and never will.
space has been explored by Orbital flights Human flights
It's possible that other planets have life - and even intelligent life - and that we simply don't know about them yet. Not many planets have been explored so far.
mercury venus mars Jupiter Saturn uranus and neptune
Lewis and Clark explored the Louisiana Territory.
He only explored the east coast of Canada.