If an extremely luminous supernova occurred within our own Milky Way galaxy, how would it likely appear on Earth?

Answer

Visible across the entire planet, potentially outshining planets and all other stars during the daytime

Such an explosion occurring nearby would generate staggering brightness, likely rendering it visible across the entire planet, even during daylight hours, for an extended period.

If an extremely luminous supernova occurred within our own Milky Way galaxy, how would it likely appear on Earth?
galaxyastronomystarssupernovabrightness