Misc: Planet that orbits the Sun every 11.86 earth years?

Questions

whose solo release in 1970 included 'that would be something', 'maybe i'm amazed' and 'every night'?

who was alexander the great's horse?

hitler's plan 'operation sea lion', called for the invasion of which country?

what was hitler's plan for the invasion of england?

whose plan was 'operation sea lion' for the invasion of england?