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Sagot :
1 / H and express it in years:
(b) [tex]\frac{1}{H}[/tex]= [tex]\frac{1}{22*10^{-3}m/s.ly } [\frac{(1 yr).(3*10^{8}m/s }{1 ly}][/tex]
=1.36×[tex]10^{10} yr[/tex]
=13.6 billion years.
How does Hubble's law relate galaxy speed and distance?
- Hubble's law, which simply states that the velocity of a galaxy (or, as it is sometimes plotted, its redshift) is directly proportional to its distance, also reveals important information about the state of the universe.
- There should be no relationship between distance and velocity if the universe is static and unchanging. If the universe is expanding, we should expect a relationship between distance and velocity.
- The most common analogy is that of an explosion: the shrapnel fragments produced have varying velocities, with the most distant objects from the source of the explosion having the greatest velocities.
- Astronomers believe that Hubble's law is a direct result of the universe's ongoing expansion, and that the evidence suggests that the universe began in an explosion known as the Big Bang.
To learn more about Hubble's law relate galaxy speed and distance refer to
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