Mass estimates refer to the process of quantifying the mass of an object or substance. This can involve various methods such as direct weighing, calculation based on known densities and dimensions, or indirect measurement through gravitational or other physical interactions. Mass estimates are used in various scientific disciplines, including physics, chemistry, biology, and astronomy, to better understand and characterize the properties of different materials and systems. These estimates are essential for various applications, ranging from determining the weight of an object in everyday life to understanding the mass distribution of galaxies in astrophysics.