SciencefromBig Think3 days agoGravitational lensing is amazing, but won't solve the Hubble tensionTwo independent measurement methods produce conflicting expansion rates (67 vs 73 km/s/Mpc), creating the Hubble tension that lensing methods alone cannot resolve.
SciencefromBig Think1 month agoAsk Ethan: Is the Hubble tension the same thing as dark energy?Dark energy and the Hubble tension both stem from observations indicating the Universe's expansion has accelerated in recent cosmic history.
Sciencefromwww.scientificamerican.com2 months agoWarp Speed! How Some Galaxies Can Move Away from Us Faster Than LightNothing can move faster than light through space, but cosmic expansion can make distant galaxies recede from us faster than light.