Astronomical surveys involve the systematic observation and collection of data on celestial objects such as stars, galaxies, and other astronomical phenomena. These surveys are conducted using telescopes and other instruments to scan the sky and gather information on various aspects of the universe. Surveys can cover a wide range of topics, including the distribution of galaxies, the properties of stars, the detection of exoplanets, and the study of cosmic microwave background radiation. Astronomical surveys play a crucial role in advancing our understanding of the universe and are essential for identifying new objects and phenomena in the cosmos.