What is in this image? Describe it as if you were explaining it to someone from the 15th century.

The image depicts a scene that may seem quite fantastical through a 15th-century lens. It involves three peculiar figures, resembling humans but with fantastical traits, such as odd head shapes and spacesuit-like attire, indicating they might be explorers from an unfamiliar territory or realm. Above them flies a metallic, saucer-like object, akin to a flying chariot, but unlike any horse-drawn vehicle; it does not require animals to move and seems to hover in the air using witchcraft or celestial mechanics unknown to our time.To the left stands a frame, similar to a painter''s easel but displaying symbols (arrows and geometrical shapes) which could be likened to unusual heraldic emblems or arcane signals. The surrounding environment does not resemble common earthly landscapes but rather a fantastical undersea grove or an otherworldly plain, contributing to the overall sense of a mythical narrative or an alchemist''s vision.This depiction would intrigue a viewer from the 15th century, capturing the imagination with its blend of the familiar and the utterly incomprehensible, suggesting a tale of travel and discovery in unknown worlds.