Tag

Structure Formation

All articles tagged with #structure formation

science-and-astronomy2 years ago

"The Controversy Surrounding Giant Rings and Arcs in Cosmology"

The recent discovery of a giant ring structure in the universe has sparked debate about its implications for cosmology. However, physicist Dominik Schwarz argues that the interpretation of these structures challenging the cosmological principle is based on a misunderstanding. The cosmological principle assumes space is maximally symmetric, and the statistical distribution of matter and light in the universe is homogeneous and isotropic. While the giant ring challenges the prevailing model of structure formation, it does not necessarily challenge the properly formulated cosmological principle. This finding may lead to a reevaluation of our understanding of structure formation and the inflationary epoch, highlighting the iterative process of observation, modeling, and refinement in our quest to understand the universe.

"The Formation of the Cosmic Web: A Glimpse into the Early Universe"
astronomy2 years ago

"The Formation of the Cosmic Web: A Glimpse into the Early Universe"

The cosmic web, a massive filament-like structure, formed over billions of years as the Universe evolved from a smooth, uniform state to one filled with galaxies and galaxy clusters. Gravity caused tiny imperfections in the early Universe to grow, leading to the hierarchical formation of structures, with stars forming first, followed by galaxies, and eventually massive galaxy clusters. The largest structures formed last, and the presence of dark energy has limited the growth of structures beyond galaxy clusters. The cosmic web is no longer growing as it once was, but is primarily being torn apart by dark energy, making the current observable Universe uniquely richly structured.

Exploring the Mysteries of Dark Energy and Cosmic Growth in SWaB's Latest Podcast.
astronomy2 years ago

Exploring the Mysteries of Dark Energy and Cosmic Growth in SWaB's Latest Podcast.

Astrophysicist Karolina Garcia discusses the composition and growth of the Universe, which is 13.8 billion years old and composed of a mix of normal matter and radiation, but is dominated by dark matter and dark energy on the largest of cosmic scales. By looking at the Universe on the largest of cosmic scales, including by seeing what structures form and how galaxies are clustered together, we can reveal its overall composition. Multiple, independent lines of evidence point to the same consensus picture of the Universe.