Tag

Cmb

All articles tagged with #cmb

science1 month ago•14 min saved

Cosmic Expansion Makes the Observable Universe Bigger Than Its Age

Space itself expanded as photons traveled, so the present observable diameter is about 92–93 billion light-years even though the universe is ~13.8 billion years old. The 13.8 billion years is the lookback time, not a static travel distance; the farthest observable regions are now ~46 billion light-years away. Distances depend on cosmological definitions and parameters, such as the particle horizon, Hubble radius, and event horizon, all described within the Lambda-CDM framework and Planck data. No local light-speed limit is violated.

via Space Daily|

#cmb #cosmology #expansion

science7 months ago•5 min saved

Cosmic Hall of Mirrors: Could the Universe Loop Back on Itself?

A COMPACT collaboration suggests the universe could be finite yet boundary-less, with light looping through space in a 3-torus topology that could create mirrored observations of the same region. While not yet confirmed, the idea expands searches for topological fingerprints in the CMB and broader Euclidean/non-Euclidean models.

via Indian Defence Review|

#3-torus #cmb #cosmology

science7 months ago•4 min saved

New Research Suggests the Universe Is More Complex and Lopsided Than Previously Thought

Recent research suggests the universe may be lopsided, challenging the standard cosmological model that assumes it is uniform in all directions, due to discrepancies like the cosmic dipole anomaly which do not align with current theories, prompting a potential overhaul of our understanding of the cosmos.

via Space|

#cmb #cosmic-dipole-anomaly #cosmology

science3 years ago•3 min saved

Universe's Shape: Doughnut, Not Pancake?

New research suggests that the universe could have a more complicated shape, like a giant doughnut, despite all evidence suggesting it's flat. The study finds that strange patterns found in echoes of the Big Bang could be explained by a universe with a more complicated topology, and astronomers have not fully tested the universe's flatness. While most observations suggest the universe is flat, there are 18 possible geometrically flat, 3D topologies, and a universe with a complicated topology could explain some of the anomalies in the cosmic microwave background.

via Livescience.com|

#cmb #doughnut #flatness

astronomy3 years ago•6 min saved

Unveiling Cosmic Mysteries: Dark Matter and Black Holes in the Universe

Cosmologists are using the cosmic microwave background (CMB) radiation to map the distribution of both ordinary matter and dark matter in the universe. The CMB light has been stretched, squeezed, and warped by all the matter in its way, leaving detectable imprints on its magnification and color. By examining CMB data taken by the European Space Agency’s Planck satellite and the ground-based Atacama Cosmology Telescope, scientists have been able to measure the alignment of ordinary matter and dark matter, providing estimates for the strength and temperature of the dispersing blasts. These insights are helping to settle some long-standing cosmological mysteries and pose some new ones.

via Quanta Magazine|

#astronomy #cmb #cosmology