Cosmic distance refers to the measurement of the distance between celestial objects in outer space, such as stars, galaxies, and clusters. Understanding the distances between these objects is crucial for accurately studying the structure and dynamics of the universe, as well as for determining the age and evolution of astronomical bodies. Several methods are used to measure cosmic distances, including parallax measurements, redshift measurements, and studies of standard candles such as supernovae. Precise measurements of cosmic distances help astronomers map out the large-scale structure of the universe and gain insights into its formation and evolution.