nasa has released an image taken by the probe 's visual and infrared spectrometer -lrb- virs -rrb- to reveal distinct features such as volcanic vents and fresh craters .
nasa has released an image taken by the probe 's visual and infrared spectrometer -lrb- virs -rrb- .
to highlight the geological features , the images have been overlain on a black and white mosaic from the mercury dual imaging system -lrb- mdis -rrb- .