Our recent discoveries suggest the amount of dark matter in our galaxy - about90% of the matter, appear to be:inconsistent with the other galaxies. Other spiral galaxies appear to have far more darkmatter than our Milky way galaxy.O inconsistent with the other galaxies. Other spiral galaxies appear to have far less darkmatter than our Milky way galaxy.Consistent with the other galaxies. other spiral galaxies appear to contain about thesame amount of dark matter.

Answered: Our recent discoveries suggest the…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Question

Our recent discoveries suggest the amount of dark matter in our galaxy - about
90% of the matter, appear to be:
inconsistent with the other galaxies. Other spiral galaxies appear to have far more dark
matter than our Milky way galaxy.
O inconsistent with the other galaxies. Other spiral galaxies appear to have far less dark
matter than our Milky way galaxy.
Consistent with the other galaxies. other spiral galaxies appear to contain about the
same amount of dark matter.

Expert Solution

Step 1

Galaxies and dark matter are not spread uniformly across the Universe, and instead have been concentrating, under the pull of gravity, into a weblike structure of clusters and filaments, with enormous voids in between.

So there is some evidence for large variations in the dark-matter fraction of dwarf galaxies, even though on average they tend to have higher dark-matter fractions than galaxies like the Milky Way.