Mass-wasting activities continuously expose fresh ice on a comet’s surface, thus keeping the comet active over long periods
Could a comet destroy life on Earth?
NASA comet expert Dr Joseph Nuth tells us why understanding comets is so important.
Mass-wasting activities continuously expose fresh ice on a comet’s surface, thus keeping the comet active over long periods
NASA comet expert Dr Joseph Nuth tells us why understanding comets is so important.