Astronomy Picture of the Day . A Heart Shaped Lenticular Cloud . ... Perhaps not, but on a Valentine's Day like today, one might be prone to seeing heart-shaped symbols where they don't actually exist. A fleeting pareidolia , the featured heart was really a lenticular cloud that appeared one morning last July above Mount Cook National Park in New Zealand. ... Lenticular clouds are somewhat rare but can form in air that passes over a mountain. ... Publications with keywords: clouds . ...