A huge fireball dashed across the skies of western Japan, shocking residents and dazzling stargazers, though experts said it was a natural phenomenon and not an alien invasion. Videos and photos emerged online of the extremely bright ball of light visible for hundreds of miles shortly after 11.00pm local time (1400 BST) on Tuesday. It appeared to have gone into the Pacific, he said, adding: “People reported feeling the air vibrate. It was as bright as the moon.”Objects causing such fireball events can exceed one metre (3ft) in size, according to Nasa. Fireballs that explode in the atmosphere are technically referred to as bolides, although the term fireball is often used interchangeably.