they can detect faint galaxies which no optical telescope can, they can work even in cloudy conditions, they can work during the day and night, All of the above" /> they can detect faint galaxies which no optical telescope can, they can work even in cloudy conditions, they can work during the day and night, All of the above" /> they can detect faint galaxies which no optical telescope can, they can work even in cloudy conditions, they can work during the day and night, All of the above" />