Dwarf planet Haumea orbits in Pluto’s realm of the solar system. It’s the most distant little world known to have a ring. Scientists in Brazil have new insights on how Haumea’s ring maintains its nearly perfect circular shape.
It seems like play, but they’re serious. Every year, at the Planetary Defense Conference, asteroid experts from around the globe run days-long simulations of asteroids headed for major cities. In 2019, it was New York City’s turn.