The document summarizes theories about how our solar system formed from a collapsing cloud of gas and dust. It describes how: 1) Our solar system likely began from a giant interstellar cloud that collapsed under gravity and formed a rotating disk, with a dense center that became the Sun and a surrounding disk that formed the planets. 2) The solar nebula disk varied in temperature by distance from the Sun, allowing different elements to condense into planetary cores near and far from the Sun, forming the terrestrial and gas giant planets. 3) Asteroids and comets are remnants from solar system formation and provide clues about its early history through observations and analysis of their composition and orbits.