point of heaven; corner of the sky
A literary or poetic expression referring to a specific spot or region in the sky, often used in descriptions of celestial phenomena or vast landscapes.
A shooting star crossed a corner of the sky.
He was lost in thought, gazing at a point in the heavens.
A set phrase composed of 天 (heaven, sky), の (possessive particle), and 一角 (one corner, a spot). The exact origin is uncertain, but it follows classical Chinese-influenced literary patterns.