Meteor Watch Day

Meteor Watch Day, observed on June 30th, encourages people to look up and observe the night sky for meteors, marked on the anniversary of the 1908 Tunguska event, in which a massive explosion, believed to have been caused by an asteroid or comet fragment exploding in the atmosphere above a remote area of Siberia, flattened an estimated 80 million trees across roughly 800 square miles without leaving an obvious impact crater. The Tunguska event remains the largest impact-related explosion in recorded history, and its remote location and the era's limited scientific investigation capabilities meant it took decades of subsequent research and expeditions before scientists developed a clearer understanding of the likely cause, an airburst explosion from a relatively small celestial object breaking apart in the atmosphere before reaching the ground. Meteors, commonly called shooting stars, occur when small pieces of space debris, typically no larger than a grain of sand or small pebble, enter Earth's atmosphere at high speed and burn up from atmospheric friction, creating a brief, bright streak of light visible from the ground under clear, dark sky conditions. While meteors can be observed on most clear nights in small numbers, dedicated meteor showers, occurring when Earth passes through debris trails left by comets, offer significantly increased meteor activity during specific, predictable annual periods. The observance encourages people to learn about basic skywatching and asteroid impact awareness, connecting recreational stargazing with genuine planetary defense science.