By sorting through the precise patterns captured in the photographs, astronomers could directly measure the basic properties of black holes and stress test Einstein's theory of gravity like never before.
The discovery of the miniature moon was announced in February, to the delight of people around the world. According to astronomers' calculations, the little moon had been circling Earth for at least a year, maybe longer. Now it's gone.
Summer star gazers in rural areas are used to seeing a handful of satellites streak across the sky. But in the coming years, eagle-eyed amateurs may be able to pick out hundreds. And for professional astronomers, research will never be the same again.