What celestial object is known for having a luminous tail, visible when it passes close to the Sun?

Comet

Comets are celestial bodies made of ice, dust, and rocks that orbit around the Sun. When they approach the Sun, the heat turns them into gas, releasing dust and gases that form a magnificent luminous tail. This tail, always pointing away from the Sun due to the pressure of solar light and the solar wind, can extend for millions of kilometers. Comets have been perceived throughout history as omens, bringing either good or bad news. Today, they are studied for what they can reveal about the primitive conditions of the solar system, as they are considered frozen remnants of the materials that formed the planets 4.6 billion years ago. Observing a comet is a fascinating reminder of cosmic history and the constant dynamics of our solar system.