Why June 30 Is the Most Important Space Day You've Probably Never Heard Of Image Credit: Pexels When you think of famous dates in space history, names like July 20 (the Moon landing) or October 4 (the launch of Sputnik) might come to mind. But there's one date you may not know, and it's arguably one of the most significant in cosmic history: June 30, World Asteroid Day. This global awareness event isn't just for astronomers and sci-fi fans. It marks a real, world-changing incident from history and sheds light on one of the greatest natural threats to life on Earth. Here's why June 30 deserves a spot on your radar. The Day the Sky Exploded: The Tunguska Event On June 30, 1908, in the remote forests of Siberia, a remarkable event took place. A massive explosion, estimated to be 1,000 times more potent than the atomic bomb dropped on Hiroshima, flattened over 80 million trees across 800 square miles. This event, known as the Tunguska event, remains one of the most sign...