👉 The fluid in the night sky, often referred to as the Milky Way's "fluid" or simply the galaxy's luminous expanse, is a vast collection of interstellar gas and dust that forms a continuous, spiral structure. This fluid, primarily composed of hydrogen gas and interstellar dust particles, glows due to the presence of ionized hydrogen atoms, which emit light when excited by ultraviolet radiation from young, hot stars. The fluid's movement and distribution are influenced by gravitational forces, resulting in a dynamic and ever-changing celestial tapestry that appears as a fluid-like motion across our night sky, giving the impression of a shimmering, ethereal substance.
