article_snippet.sent: the interactive programme lets you explore massive craters on the body - which has no atmosphere, and thus no protection like our own Earth.
article_snippet.sent: As you explore the asteroid, you will come across various ‘troughs’ - areas where the ground sinks away.
article_snippet.sent: The largest of various ‘troughs’ - areas where the ground sinks away is up to 12 miles (20km) wide and 289 miles (465km) long, similar in size to the Grand Canyon on Earth.
article_snippet.sent: Elsehwere there are craters, hills and mountains on the surface, most formed by impacts.
article_snippet.sent: Various tools also let you find out more information about the asteroid.