Dark Matter: Crash Course Astronomy #41

Today on Crash Course Astronomy, Phil dives into some very dark matters. The stuff we can actually observe in the universe isn't all there is. Galaxies and other large structures in the universe...

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A lot of people have noted that astronomy is a humbling enterprise to pursue. After all, every time we make a new discovery, we find ourselves further removed from importance. The Earth is but one planet among many, orbiting a Sun that is one star among hundreds of billions, out in the suburbs of a galaxy that is one among hundreds of billions more. It’s easy to feel pretty small when you see all that magnificence out there. And we astronomers keep making it worse! Because now we know that what we can see isn’t even everything there is. Normal matter, the stuff that makes up you and me and all we observe in the Universe? That’s only a small fraction of what’s actually out there. It’s time we talk about some very, very dark matters. In the 1960...
Dark Matter: Crash Course Astronomy #41
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