What is the realm of the Aesir gods?

The story behind the answer

Asgard is the home of the Aesir gods—Odin, Thor, and Frigg—one of the Nine Realms linked to Earth (Midgard) by the rainbow bridge, Bifröst. It’s depicted as a fortified celestial stronghold with grand halls like Valhalla, where warriors chosen by the Valkyries prepare for Ragnarök. Asgard is the political and spiritual center of the Aesir’s power in Norse myth.

To avoid confusion: Midgard is the human world, Vanaheim is the realm of the Vanir gods (with whom the Aesir once warred and later made peace), and Niflheim is a cold, primordial realm. Memory tip: Aesir