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10 Cards in this Set
- Front
- Back
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The flat part of the milky way galaxys rotation curve tells us that stars in the outskirts of the galaxy |
Orbit the galactic center just as fast as stars coser to the center |
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Dark matter is inffered to exist because |
We can observe its gravitational influence on invisible matter |
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Strong evidence for the existence of dark matter comes from observations of |
clusters of galaxies |
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A photo of a cluster of galaxies shows distorted images of galaxies that lie behind it at greater distances. This is an example of what astronomers call |
a gravitational lens |
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Based on observational evidence, it is possible that dark matter doesnt really exist? |
Yes, but only if there is something wrong with our current understanding of how gravity works on large scales |
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Based on current evidence, which of the folloing is considered a likely candidate for the majority of the dark matter in galaxies? |
Subatomic particles that we have not yet detected in partile physics experiment |
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Which of the following provides evidence that the majority of the dark matter consists of weakly interacting massive particles? |
Measurments of the amount of deuterium made in the early universe |
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Which region of the eary universe was most liekly to become a galaxy? |
A region whose matter density was higher than avergae |
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Dark energy has been hypothesized to exist in order to explain |
Observations suggesting that the expansion of the universe is accelerating |
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The major evidence for the idea that the expansion of the universe is accelerating comes from observations of |
White dwarf supernovae |
