How Mars is slowly killing its biggest moon
Phobos. It means fear. With a seven-mile diameter, it is the innermost and biggest moon of Mars. Our impressive Nasa picture shows a world so small that a jumping astronaut would be propelled into space. Phobos is doomed. Its orbit round Mars is decaying, bringing it closer to its parent world by an …
Carter Perkins flipped this story into 2015 Highlights•3024d