Cosmic Archaeology from an Ancient Pulsating Star
Is the gravitational constant really constant? Today’s authors investigate using an 11 billion year old star.
Is the gravitational constant really constant? Today’s authors investigate using an 11 billion year old star.
Is string theory compatible with observational data? Today’s paper looks at how avoiding the swampland of unsuccessful string theories can mean violating reliable constraints on cosmological quantities.
Let’s be serious for a moment: nothing dire is going to happen on December 21st. Rest easy. But in celebration I’ve decided to count down my top five favorite astronomical doomsday scenarios, ordered from most to least plausible.