Cosmic measurement refers to the techniques and methods used to determine distances and sizes of celestial objects in the universe. Astronomers use various tools, such as telescopes and satellites, to gather data about stars, galaxies, and other cosmic entities. One common method is parallax, which measures the apparent shift of an object against a distant background as Earth moves in its orbit. Another important aspect of cosmic measurement is the use of standard candles, like Type Ia supernovae, which have known brightness. By comparing their actual brightness to how bright they appear from Earth, scientists can calculate their distance. These measurements help us understand the scale and structure of the universe.