Additionally, slides used in the lecture are embedded below but also are available here in Powerpoint format.
Questions after the lecture? Please ask them in here.
Graeme1858 wrote:At about 16 minutes there is a slide on the Bullet Cluster and you use the phrase " the dark matter can be seen" and is shown in blue, separate from the red gas clouds.
Could you clarify please, I understand the requirement for an even spread of mass for the gravitational lens to work smoothly but is the blue a false colour image or does the dark matter cause the gas to appear blue?
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