Misc: Who discovered the planet Uranus?

Questions

Classical Music : His principal works are the operas Wozzeck & Lulu?

Classical Music : Schumann's wife hung around him after her husband Robert Schumann died?

Classical Music : The Love Theme from Elvira Madigan is this number piano concerto?

Classical Music : This composer was a pupil of Beethoven & a teacher of Liszt?

Classical: Bach's Two & Three part inventions are a primer for this opus?