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Dark Matter with Professor Marusa Bradac 

New UCD Professor Marusa Bradac discusses her favorite California pastimes - surfing, skiing, diving, and oh yes, discovering the secrets of Dark Matter.

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After you have enjoyed the broadcast,
learn more about Dark Matter.

Image #1

Image #1 shows the Bullet Cluster - the aftermath of a collision of two galaxy clusters. Each cluster contains many galaxies (seen in white and yellow) and has a total mass of 1000 trillion times larger than our Sun. The collision occurred 150 million years ago at a speed of 10 million mph. The galaxies passed through one another with almost no interaction because there is so much space between their stars. The red clouds are hot ionized gases that did interact strongly and were slowed down by the collision. The blue areas are the computed locations of dark matter, determined by the amount that they bend light from more distant galaxies. The dark matter "haloes" show that during the collision they didn't interact with the galaxies, the hot ionized gases, or even the other dark matter halo. This image shows that dark matter seems to interact only through gravity.

Bullet Cluster

Professor Marusa Bradac
Image #2

Favorite pastime of Probessor Bradac

Image #3

Another favorite pastime of Probessor Bradac
Professor Marusa Bradac









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