Five years since New Horizons saw Pluto

It’s exactly five years since NASA’s New Horizons spacecraft gave us a close-up view of Pluto, after a 10-year, 4.8-billion-kilometre journey. Moving to within 12,500 kilometres of the dwarf planet’s surface, it revealed an icy world of towering mountains, giant ice sheets, pits, scarps, valleys and terrains seen nowhere else in the Solar System. And … Continue reading Five years since New Horizons saw Pluto

Planet or not, Pluto started out hot

Pluto appears to have formed quickly and with such heat that from birth it had a large ocean beneath a layer of insulating ice, scientists say. It’s a finding that not only alters our understanding of the most famous dwarf planet, but also adds to the growing scientific consensus that once planets began forming, they … Continue reading Planet or not, Pluto started out hot