- #1
PoPpAScience
Question: When Galaxies are being drawn into clusters, does expansion of the universe enter into the equation? In other words, does expansion effect clustering? :shy:
Well, it's probably more astronomers studying galaxies (cosmologists only run computer models and make theories )Blueplanetbob said:Dark matter would increase the gravitational attraction. As I understand it, the strongest evidence for dark matter comes from cosmologists studying the behaviour of galaxies. although do they take into account the possible existence of black holes at the centre of each galaxy?
Yes expansion effects clusteringPoPpAScience said:Question: When Galaxies are being drawn into clusters, does expansion of the universe enter into the equation? In other words, does expansion effect clustering? :shy:
Galaxy clustering refers to the tendency of galaxies to group together in certain regions of space. This phenomenon is caused by the gravitational pull between galaxies, as well as the distribution of dark matter in the universe.
Expansion of the universe causes galaxies to move away from each other, which can impact their clustering. As the distance between galaxies increases, the strength of their gravitational pull decreases, leading to a decrease in clustering.
Scientists use a variety of methods to study the impact of expansion on galaxy clustering, including computer simulations, observational data from telescopes, and statistical analyses. These methods help us understand how galaxies are distributed in the universe and how they are affected by expansion.
Yes, galaxy clustering can provide valuable insights into the expansion of the universe. By studying the distribution and clustering of galaxies, scientists can measure the rate of expansion and track its changes over time. This information can help us better understand the evolution of the universe.
Studying galaxy clustering can have various applications, including helping us understand the nature of dark matter and dark energy, testing theories of gravity, and improving our understanding of the large-scale structure of the universe. This knowledge can also have practical applications, such as improving cosmological models and informing future space missions.