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Cepheid Stars

All articles tagged with #cepheid stars

science-and-astronomy2 years ago•8 min saved

"James Webb Space Telescope Sheds Light on Universe's Expansion Rate Controversy"

The James Webb Space Telescope (JWST) has contributed to the ongoing debate over the universe's expansion rate, known as Hubble tension. The JWST's observations have shown that the discrepancy in the Hubble constant, which measures the rate of the universe's expansion, is likely not due to technical issues with the Hubble Space Telescope. The JWST's infrared vision has provided more accurate measurements of Cepheid stars, which are crucial for determining the Hubble constant. The results highlight the need to understand why different measurement tools are not in agreement.

via Space.com|

#cepheid-stars #hubble-constant #hubble-tension

science2 years ago•6 min saved

New Measurement Challenges Physics' Understanding of the Universe

A new study has amplified the Hubble tension, a discrepancy in cosmic expansion rate measurements, by providing the most accurate calibration of Cepheid stars for distance measurements. This discrepancy calls into question fundamental concepts in physics and has implications for understanding dark energy, the time-space continuum, and gravity. The study achieved the most accurate calibration of Cepheid stars for distance measurements, amplifying the Hubble tension. The discrepancy calls into question the basic concepts of physics and has implications for the nature of dark energy, the time-space continuum, and gravity.

via SciTechDaily|

#astrophysics #cepheid-stars #cosmology

astronomy2 years ago•5 min saved

"Revolutionizing Our Understanding of the Universe through Extra Dimensions and Quantum Mechanics"

A new study by the Stellar Standard Candles and Distances research group has achieved the most accurate calibration of Cepheid stars for distance measurements to date based on data collected by the European Space Agency's Gaia mission. This new calibration further amplifies the Hubble tension, which refers to the discrepancy of 5.6 km/s/Mpc in the measurement of the cosmic expansion rate based on the echo of the Big Bang (CMB) or direct measurement based on today's stars and galaxies. The study confirms the 73 km/s/Mpc expansion rate and provides the most precise, reliable calibrations of Cepheids as tools to measure distances to date. The discrepancy has implications for the understanding of the basic physical laws that govern the universe, including the exact nature of dark energy, the time-space continuum, and gravity.

via Phys.org|

#astronomy #cepheid-stars #cosmic-distance-ladder