What’s dark matter? Could it be undiscovered black holes or even planets? We can’t see wind, but we know it’s there because of its effects on things we can see. That’s how it is with dark matter. In 1937, astronomers observed galaxies moving around as a result of a huge mass they couldn’t see. This “missing mass” problem gave rise to the concept of dark matter. According to Neil deGrasse Tyson, dark matter is a mystery that raises fascinating questions. Continue reading to learn what dark matter is not and what it might be.
Neil deGrasse Tyson: Dark Matter & the Missing Mass Problem
