Adam G. Riess

Nov 17, 2024 | projektpulsar.pl | Marc Kamionkowski |Adam G. Riess

Różne pomiary tempa ekspansji Wszechświata nie są ze sobą zgodne. Czy dodatkowy składnik występujący we wczesnym kosmosie może wyjaśnić tę rozbieżność? Piętnaście lat temu kosmolodzy byli na fali. Prosty, ale szalenie udany „standardowy model kosmologiczny”, zawierający zaledwie kilka składników, mógł wyjaśnić znaczną część tego, co widzimy we Wszechświecie.

Oct 15, 2024 | scientificamerican.com | Marc Kamionkowski |Adam G. Riess

Fifteen years ago cosmologists were flying high. The simple but wildly successful “standard model of cosmology” could, with just a few ingredients, account for a lot of what we see in the universe. It seemed to explain the distribution of galaxies in space today, the accelerated expansion of the universe and the fluctuations in the brightness of the relic glow from the big bang—called the cosmic microwave background (CMB)—based on a handful of numbers fed into the model.

Mar 29, 2024 | tucson.com | Adam G. Riess

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Feb 8, 2024 | daily.jstor.org | Don Lincoln |Edwin Hubble |Adam G. Riess |Mario Livio

The icon indicates free access to the linked research on JSTOR. Astronomers have known for nearly a century that our Universe is expanding. For decades, scientists expected this expansion to be slowing down due to the force of gravity. However, that all changed in the 1990s when astronomers realized that not only is the Universe expanding, but it’s doing so at an accelerating rate, like a runaway train on a downward slope.

Feb 6, 2024 | iopscience.iop.org | Adam G. Riess |Johns Hopkins |Gagandeep Anand |Wenlong Yuan

In the past decade, an intriguing and persistent discrepancy referred to as the "Hubble tension" 7 has been apparent at high significance (>5σ) between the Hubble constant (H0) directly measured from redshifts and distances, which are independent of cosmological models, and the same parameter derived from the ΛCDM model calibrated in the early Universe (for a recent review, see Verde et al. 2023). The most significant disparity arises from the strongest constraints.