Rare Blue Supermoon 2024. If you look up this evening, monday august 19, weather permitting, you’ll be treated to the rare sight of a blue supermoon. It is unusual because it’s both blue and super.

If you look up this evening, monday august 19, weather permitting, you’ll be treated to the rare sight of a blue supermoon. According to the supermoons table by fred espenak, former nasa astrophysicist, this.