Dark matter

Dark matter
Many folks have heard of Dark Matter and Dark Energy. Most folks, however, can’t tell you anything about them. They’re dark. They’re lurking out there. That’s about it.
They’re too important to leave it at that. So, let’s look at the “whys” and “wherefores” of the Dark Duo. With today’s post, I’m going to begin this exploration with a simple fact and its cosmic (literally) interpretation.
Let’s start with a very important distinction. Dark Matter and Dark Energy have nothing (as far as we know) to do with each other. The only thing they have in common is that evocative adjective “dark,” which, for astrophysicists, simply means we can see an effect but we can’t see the cause. -Adam Frank

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