In what consists the redshift phenomenon?
Bodies of the universe move away
The bodies of the universe are approaching
None of them
What astronomer/s concluded the universe is expanding?
Lamaitre
Slipher
Friedmann
What is the “lookback time”?
Look at the sky is look at the past
Look at the sky is look at the future
The phenomenon that would make plausible “The Time Machine”
Galaxies are moving away from each other because they are clearly moving
How old is the universe?
1382 million years
3 times older than the Earth
More than 13.000 million years
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