Cosmology Flashcards

1
Q

when things are redshifted there are

A

moving away from us

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2
Q

when things are blueshifted they are

A

moving toward us

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3
Q

redshift proves what

A

our universe is expanding

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4
Q

the more distant the galaxy, the greater its redshift and hence the faster it moves awat from us

A

Hubble’s Law

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5
Q

what is the Big Crunch

A

the end of the universe when it collapsing in on itself

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6
Q

what kind of universe model do we live in

A

accelerating universe

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7
Q

what is dark matter

A

matter which does not give off light but we feel it’s gravitational effect

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8
Q

dark energy

A

type of matter which has a anti-gravity effect

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9
Q

what kind of model of the universe would end in a big crunch

A

a closed universe

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10
Q

what kind of model of the universe would have a critical density

A

flat universe

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11
Q

what kkind o fmodel of the universe would result from there not being a high enough density

A

open universe

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