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Astronomy
Cosmology
Question | Answer |
---|---|
What is cosmology? | A science that explains about the universe's birth and development. |
True or false - Is the universe expanding overtime? | True |
Does the universe has an edge or a center? | No; according to the cosmological principle, the universe has no center nor edge. |
The farther the galaxy, ........ | The farther we look back in time (distant galaxies are much younger than nearby galaxies) |
How can we find the age of the universe with distant galaxies? | Lookback time - The amount of time since the light we see from distant objects. |
True or false - The universe expanding into something. | False |
In the beginning of the universe, helium and hydrogen filled the space almost __________ | Uniformly |
The densest area, with much matter, becomes the | "seeds" of galaxies |
in the first step of galaxy's formation, the cloud expands along with the universe, however it stopped by __________. | Gravity |
Gravity contracts clouds into ___________, which helps form galaxies. | Protogalactic clouds |
Where do protogalactic clouds form? | Densest regions of the universe |