Answer Happy

Which of the following is true about dark matter? O It looks invisible because it does not emit any electromagnetic light. o It will emit far infrared light, making the galaxy light up as if it were on fire. O The human body, like most galaxies, is mainly made up of dark matter. O It is just cold neutrons, unable to interact with anything else, floating in space. O None of the above are true or false as we know nothing about dark matter.