Science news this week: Comets light up the skies and race toward the sun, our galaxy’s mysterious glow is explained, and scientists tell us why time moves faster as we age

This week’s science news has been comet-ing thick and fast, with a flurry of reports on three dusty space snowballs that are hurtling through our cosmic backyard.

First are the comets Lemmon and SWAN, which reached their peaks in brightness in Earth’s skies this week, enabling skywatchers to easily glimpse them. This led to some stunning observations, with Lemmon captured flying through a sky drenched in auroral technicolor over Scotland and getting its tail temporarily shredded by solar wind above Czechia (also known as the Czech Republic).