Calculate the age of the universe for the following Hubble's constant, 200 1... - N (d) 20 km/s/Mpc
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- As per Hubble's law, the universe is expanding. If we assume that the expansion's apparent velocity has been constant, we can estimate the time the expansion was happening.
- This gives us the age of the universe and can be derived from Hubble's law. This time also known as Hubble's time is given by,
Here H0 is the Hubble's constant.
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- In the reading, you were told that there were roughly 10,000 galaxies in the image of the Hubble Ultra Deep Field alone. The image is roughly 10 square arcminutes and there are roughly 1.5*10^8 square arcminutes composing the entire sky. With that in mind and assuming that the Hubble Ultra Deep Field represents an average part of the sky, roughly how many galaxies may exist in the observable universe? (Please include commas for every factor of 1,000; for example 2,343,567,890)Calculate the age of the universe for the following Hubble's constant, (a) 30 km/s/MpcCalculate the Hubble constant for a universe that is 20 billion years old.
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