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|cosmological principle ||cosmology ||homogeneous
|Hubble constant ||Hubble law ||isotropic
|Olbers' Paradox ||perfect cosmological principle ||
- What are the assumptions that Olber's Paradox is based on?
- Why is the night sky dark? What important
conclusions can you draw from the simple observation that the night sky is dark?
- Will an object with a large redshift be far away or close?
- What can the Hubble constant constant (Ho)
tell you about the age of the universe? How would the derived age of the universe
change if Ho was 50
km/sec Mpc-1 instead of 100 km/sec Mpc-1?
- Is the Hubble constant actually constant throughout time? Why or why not?
- What would the relation between the radial velocity and distance be if
there was no expansion? What would the relation be if the universe was
- Is there a center to the expansion in normal three-dimensional space? Why
or why not?
- Why is an analogy like flat houses on an expanding balloon used to
try to picture the expansion?
- Is the space between stars inside a galaxy expanding? Why or why
not? Is the space between the molecules in your body expanding with the
universe? Why or why not?
- How is looking at faraway objects equivalent to looking back in time?
- What is the cosmological principle? What is the perfect cosmological
principle? Which one can an evolving universe fit in? Why?
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last updated: 26 May 2001
Is this page a copy of Strobel's
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