Articles by

Ken Croswell

A supernova’s delayed reappearance could pin down how fast the universe expands

A meandering trek taken by light from a remote supernova in the constellation Cetus may help researchers...

A shadowy birthplace may explain Jupiter’s strange chemistry

Jupiter may have formed in a shadow that kept the planet’s birthplace colder than Pluto. The frigid...

A record-breaking, oxygen-starved galaxy may be full of gigantic stars’ shrapnel

The most oxygen-poor star-forming galaxy ever found hints that the first galaxies to arise after the universe’s...

The ‘USS Jellyfish’ emits strange radio waves from a distant galaxy cluster

Something’s fishy in the southern constellation Phoenix. Strange radio emissions from a distant galaxy cluster take the...

The number of Milky Way nova explosions per year has been pinned down

Each year, astronomers discover nova explosions in the Milky Way that cause dim stars to flare up...