Dark matter appears as a hypothesis to explain the apparent absence of visible matter to explain the rate of expansion of this visible matter.
If all the visible matter cannot account for it, then there must be some invisible matter, lets call it dark, because it emits no light.
Now, if there's so much of this dark matter out there, it should have some impact on normal matter, besides the rate of expansion, let's look for that.... what do you know? they found something like that!
See how science works?
Watch the world, do some math, come up with a prediction, the world doesn't seem to match up... maybe we're missing something... What would happen if we put this thing there?.... ah, that... ok let's see if that happens...yes it does! AWESOME! OR, no it doesn't... damn... back to the drawing board (this last option happens more often than the first, but you only get the successes in your schoolbooks, encyclopedias and the like.
If all the visible matter cannot account for it, then there must be some invisible matter, lets call it dark, because it emits no light.
Now, if there's so much of this dark matter out there, it should have some impact on normal matter, besides the rate of expansion, let's look for that.... what do you know? they found something like that!
See how science works?
Watch the world, do some math, come up with a prediction, the world doesn't seem to match up... maybe we're missing something... What would happen if we put this thing there?.... ah, that... ok let's see if that happens...yes it does! AWESOME! OR, no it doesn't... damn... back to the drawing board (this last option happens more often than the first, but you only get the successes in your schoolbooks, encyclopedias and the like.
