by Shane L. Larson I have a good friend, Tyson, whom I don’t get to see nearly often enough. We are both privileged to be among the first generation of scientists who will know the Universe by obse…

100 million tons. That’s the mass of a sugarcube-sized pinch of neutron star. Once all the gasses have condensed, climbed the periodic table, collapsed in upon each other, like some taxi-cab flirte…

YouTube video by LIGO Virgo KAGRA

GW240925 and GW250207 are two loud gravitational-wave signals from binary black hole coalescences observed with network signal-to-noise ratios $\ensuremath{\sim}32$ and $\ensuremath{\sim}69$, respecti...

200 years ago, we hardly knew anything about our Universe on cosmic scales. Today, there's so much that we know. Here's how we arrived.