Tag

Galaxy Distribution

All articles tagged with #galaxy distribution

science6 months ago

Scientists suggest Earth resides in a vast cosmic void based on Big Bang echoes

Scientists propose that our galaxy may reside in a massive under-dense region, or 'void,' which could explain the discrepancy in measurements of the universe's expansion rate known as the Hubble tension. This void, potentially spanning a billion light-years, might cause local galaxies to appear to recede faster, aligning local observations with cosmic microwave background data. While this hypothesis is supported by some galaxy surveys and baryon acoustic oscillation data, it remains controversial and requires further investigation with upcoming measurements to confirm or refute the idea.

astronomy2 years ago

Connecting the Clumpiness of the Universe to Dark Matter through Axions.

Astronomers may have found evidence that dark matter is made of axions, ultra-light particles that exhibit wave-like behavior and influence the formation and distribution of dark matter, smoothing out the Universe. The multinational team of researchers led by Keir Rogers from the University of Toronto analyzed the "clumpiness" of the Universe and found that cosmic matter is more evenly distributed than expected. While it's not iron-clad proof that axions are dark matter, the implications for axions are strong, and more observations are needed to confirm their role in the Universe.