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- https://geo.libretexts.org/Courses/Lumen_Learning/Physical_Geography_(Lumen)/03%3A_The_Universe/3.01%3A_Introduction_to_the_UniverseThis 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.
- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/14%3A_Astronomy/14.01%3A_The_UniverseThis page discusses the Whirlpool Galaxy's interaction with NGC 5195 and highlights advancements in radio astronomy. It reviews Edwin Hubble's findings on the universe's expansion and the Big Bang the...This page discusses the Whirlpool Galaxy's interaction with NGC 5195 and highlights advancements in radio astronomy. It reviews Edwin Hubble's findings on the universe's expansion and the Big Bang theory's timeline. The universe is largely composed of dark matter and dark energy, affecting galaxy movement and expansion.
- https://geo.libretexts.org/Courses/Lumen_Learning/Earth_Science_(Lumen)/15%3A_Stellar_Evolution_and_Our_Sun/15.02%3A_Stellar_Life_CycleThis page discusses stellar evolution, detailing the life cycle of stars from formation to collapse, based on their mass. Stars evolve through phases like red giants and supernovae, with outcomes incl...This page discusses stellar evolution, detailing the life cycle of stars from formation to collapse, based on their mass. Stars evolve through phases like red giants and supernovae, with outcomes including white dwarfs, neutron stars, or black holes. Key processes involve nuclear fusion and core collapse, influenced by mass and composition.
