Comet Siding Spring makes close pass by Mars
![Mars flyby illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/10/Mars_free.jpg?fit=860%2C460&ssl=1)
Spacecraft orbiting Mars hunkered down behind the planet to safely observe comet Siding Spring's close approach, as shown in this illustration. (Spacecraft are not to scale.)
JPL-Caltech/NASA
Spacecraft orbiting Mars hunkered down behind the planet to safely observe comet Siding Spring's close approach, as shown in this illustration. (Spacecraft are not to scale.)
JPL-Caltech/NASA