By Tim Stephens

New observations of black hole devouring a star reveal rapid disk formation

New TDE observations led by astronomers at UC Santa Cruz now provide clear evidence that debris from the star forms a rotating disk, called an accretion disk, around the black hole. Theorists have been debating whether an accretion disk can form efficiently during a tidal disruption event, and the new findings should help resolve that question.

By Tim Stephens

Alaska’s salmon are getting smaller, affecting people and ecosystems

The size of salmon returning to rivers in Alaska has declined dramatically over the past 60 years because they are spending fewer years at sea, according to a new study. Salmon are critically important to both people and ecosystems in Alaska. Smaller salmon provide less food for people who depend on them, less value for commercial fishers, and less fertilizer for terrestrial ecosystems.