Respuesta :
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.
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