“When you’re named after one of the biggest constellations in the night sky, the pressure is on to display a little star power — and the young pianist Orion Weiss did exactly that,” proclaims The Washington Post; Weiss joins the MSO for piano variations by Dohnányi. Music Director Ken-David Masur conducts Mendelssohn’s Fifth Symphony, known as the “Reformation” for its celebration of the Protestant church; its music turns Martin Luther’s hymn “Ein feste Burg ist unser Gott” (“A mighty fortress is our God”) into a triumphant oratorio without words.