A Record of Space and Science

[Each volume can be viewed separately and is regularly updated~] The universe is made up of different types of matter and energy. Based on our current understanding, the matter and energy in the universe can be broadly divided into ordinary matter, dark matter, dark energy, cosmic background radiation, and the interstellar medium. Dark matter and dark energy remain at the forefront of scientific research, and their roles in the evolution of the universe have yet to be fully explained. Through ongoing observations and theoretical speculation, we are gradually uncovering the mysteries of the universe's structure.