[camle]

there was one where they found a parallel earth on an opposite side of the sun, and sent someone to investigate. he crashed because the electricy was backwards...all i remember was the opening scene where this guy scans a secret plans with a false eye

[Kirkwood]

Journey to the Far Side of the Sun.

I liked the sfx models more than the story, but it is a good selection.

[Joe Brower]

The movie you're referring to was "Journey to the Far Side of the Sun", original title "Doppelgänger". It was made in 1969 by Gerry Anderson, the same guy behind The Thunderbirds, Captain Scarlet, UFO, etc. Yes, a classic, and quite unique.

My other faves:
The Blob (the original -- scared the beejezus out of my 10-y.o. self)
The Thing (John Carpenter's version from 1981)
Silent Running
Quatermass and the Pit
District Nine
Colossus - The Forbin Project
Starship Troopers (so bad it was good)
Robocop (both version were good in their own ways)
Gantz (Japanese; very unique)
Slaughterhouse Five