Dark Matter: A Cosmic Ghost Story [Around the Globe]

There is a ghost in the universe. Many things are “invisible” because they do not emit light at wavelengths we can see: newborn stars glowing infrared, microwaves from start of universe, and rapidly spinning neutron all shine, just it parts spectrum that human eyes blind to. But these still light, kind. We could call this “type one” invisibility: invisible point view beings but perfectly visible if you “see” with or microwave, radio wave eyes. over last few decades, astronomers have become aware there something truly haunting spaces our cosmos. Dark matter so invisible, got glimpse it—at all—and only guess its existence see effects has on normal surrounds it. As far as tell, dark kind two” completely across entire electromagnetic spectrum.