The death of the universe - Renée Hlozek
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But to do this we need some understanding of the intrinsic (underlying), or the average size of these features. These cosmic ripples in the CMB help us to do this. The ripples are set up when the universe was a hot fluid of plasma, when it was so hot that all electrons and protons were in a `soupy’ mix. This animation shows how the ripples imprint themselves on the CMB.
In a recent blog post on her own website, TED Fellow and cosmologist Renée Hlozek describes why this is a big day for astrophysics and cosmology. We asked her to explain what the excitement is all about. Read more on the TED Blog.
One of the ways we detect dark matter is by how it distorts light. Just like the kind of lenses made of glass that we wear in glasses, dark matter acts like a gravitational lens and bends light around it. This causes the light from background galaxies to be smudged, smeared and stretched. How much it is stretched depends on the distance between us, the foreground galaxies doing the lensing and the background galaxies, and also the mass of the lensing galaxies. You can read more about this lensing here.
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