A distant star is a celestial body that emits light and heat, located far away from Earth. Stars are primarily composed of hydrogen and helium and undergo nuclear fusion in their cores, producing energy. The light from distant stars can take millions of years to reach us, allowing astronomers to study the universe's history. Many distant stars are part of galaxies, such as the Milky Way, and can be observed using telescopes. Some stars are so far away that they appear as mere points of light in the night sky. Understanding distant stars helps scientists learn about the formation and evolution of the universe.