As I write this, India’s Mars Orbiter Mission has been orbiting the red planet for just about a day, and NASA’s MAVEN for only three. I haven’t seen any images from MOM yet, but the Mars Atmosphere and Volatile EvolutioN spacecraft took ultraviolet images just eight hours after achieving orbit, and they’re breathtaking.
Mars has an atmosphere, thin, but there. And it has different components to it, seen in different wavelengths (colors) of UV light.
Also watch: NASA’s SnowEx Completes First Test Flights