Why This Universe? 92 - What Cosmology Has in Store for 2025 (Ft. Dan Scolnic)
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Jan 13, 2025 Dan Scolnic, a Professor at Duke University and an expert in near-field cosmology, discusses exhilarating advancements expected in cosmology by 2025. He tackles the Hubble tension and its implications for our understanding of the universe’s expansion. Upcoming projects, including the James Webb Space Telescope's findings, promise to shed light on dark energy and the cosmic microwave background. Anticipation builds around new astronomical data and the potential for groundbreaking discoveries that could redefine cosmological models.
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Hubble Tension Explained
- The Hubble tension arises from discrepancies in measuring the universe's expansion rate.
- Local measurements suggest a faster rate (73) than predictions from the early universe (67).
Possible Solutions to Hubble Tension
- Resolving the Hubble tension requires examining early universe conditions, how the universe changed, or our unique position.
- This might involve revising our understanding of fundamental aspects like dark energy, dark matter, or gravity.
JWST's Hubble Constant Measurement
- The JWST's TGRB-SBF project uses the tip of the red giant branch as a standard candle.
- This allows for independent measurement of the Hubble constant, potentially resolving discrepancies between existing teams.