Unique Celestial Event: ‘Blue Supermoon’ to Illuminate the Sky This Week, Next Appearance Expected in 2037
How Often Occurs a Blue Supermoon? The NASA report on the rarity of these blue supermoons was published at the beginning of this month. It mentions that the cosmic circumstances that give rise to such moons normally happen just once every 10 years. A blue supermoon does, on rare, appear every two decades or longer….