This photo is a shadow on an asteroid
Photo: JAXA/U. Tokyo/Kochi U./Rikkyo U./Nagoya U./Chiba Inst. Tech./Meiji U./U. Aizu/AIST
Asteroids are thought to be leftovers from the dawn of our solar system, the debris that didn't get incorporated into the planets as they formed billions of years ago.
Driving the news: A new photo taken by the Hayabusa-2 spacecraft shows what the robotic explorer saw as it descended to the surface of the asteroid Ryugu to collect a sample from the ancient object. That little piece of the asteroid is expected to make it back to Earth by December.