Question: mcu are the nine realms planets?
Answer: In the MCU the 'Nine Realms' are nine major planetary bodies that are aperiodically interconnected via a series of portals and traversable via the Bifrost. These realms comprise Asgard, Midgard, Jotunheim, Svartalfheim, Vanaheim, Nidavellir, Niflheim, Muspelheim and Alfheim.