A colossal comet with a size reminiscent of a small city has explosively burst for the second time in the span of four months while hurtling towards the sun, reported Live Science. This celestial entity, known as 12P/Pons-Brooks, is categorized as a cryovolcanic comet, characterized by its solid nucleus measuring approximately 18.6 miles (30 kilometers) in diameter. Within its core lies a mixture of...