The presence of dark matter particles in barred spiral galaxies should slow down their galactic bars. However, this is not what we observe. Are galactic bars telling us to reconsider the foundations of the standard model?
Type Ia supernovae’s dimmer cousin, type II supernovae, take a shot at measuring the Hubble constant.
Tensions are rising with the beloved lambda-CDM model of the Universe. Is it time for Early Dark Energy to swoop in to save the day?
How can we use gravitational lensing to measure the expansion rate of the Universe?
The latest LIGO-Virgo catalog presents a new set of ‘standard siren’ events that can be used to study the cosmic history of our universe. Read more…
Today’s paper investigates whether it really matters how stars and galaxies cause cosmic reionization.