Since New Horizons' close encounter with Pluto 10 years ago, experts have come to think of the dwarf planet as much more ...

Instead, it's a solid ball with a density similar to that ... discovery can help expand their knowledge of the moon's history ...

"Because most solar system moons rotate very slowly (keeping the same face towards their planet as they orbit, as our moon does to Earth), any ring particles must be orbiting the moon much faster ...