The oldest objects in the universe weigh in on the heated debate over the “Hubble Tension,” disagreements on the expansion rate of the universe.
One of the most important issues in cosmology is the Hubble tension – why do different probes not agree on how fast the Universe is expanding? A popular solution is changing the physics in the very early Universe. Today’s paper explores, why this approach might not work, by measuring the expansion rate with observables independent of the early Universe.
Today’s guest post takes a look at a technique that cleverly tweaks simulated galaxy halos very early on in their lives in order to direct their growth in a specific way
What processes can explain the diversity in star formation rates exhibited by galaxies of similar masses? Today’s authors investigate this using the EAGLE simulation.
How can the first stars tell us about the nature of dark matter?
We report on Day 5 of the virtual winter AAS meeting.