We are able to observe the nebula without the aide of a telescope thanks to the large
quantity of ultraviolet light thrown out by the stars embedded within it, which works to illuminate the surrounding clouds of gas and dust.
Then, while is being irradiated with
ultraviolet light, it emits a bluish
light, which varies in intensity proportionally to the
quantity of methylmercury and inorganic mercury present in the fish,» explains Tomás Torroba, lead author
of the paper.