This chapter focuses on understanding cosmic phenomena, including the formation and expansion of the universe, differences between dark matter and energy, star systems, and types of galaxies. It explo...This chapter focuses on understanding cosmic phenomena, including the formation and expansion of the universe, differences between dark matter and energy, star systems, and types of galaxies. It explores the interactions between the Whirlpool Galaxy (M51) and the dwarf galaxy NGC 5195, revealing how past interactions have shaped M51's spiral arms. The text highlights cosmology's role in studying the universe, encompassing all existing matter, energy, space, and time.
