Exam 14: Modern Cosmology

Evidence for a very early "super rapid" inflation of the universe is that the 3-K radiation from opposite sides of the sky (i.e., 180 degrees or about 28 billion light years apart) is of nearly ___________ intensity. Time for light to travel this distance is ___________ the age of the universe in years.

Current observations indicate that the amount of baryonic matter and dark matter in the Universe

How long is one Hubble time

The Universe contains _____________________.

If a galaxy is located at a distance of 18 Mpc and is found to have recessional velocity of 1170 km/s, what is Hubble's constant based only on this galaxy

The resolution of Olbers's paradox suggests that it gets dark at night because

Measured ages of globular clusters suggests that the Universe is about

The assumption of isotropy states that

We are among the products of nuclear fusion and gravitational contraction.

If matter and antimatter combine, the result is energy.

When a proton and an antiproton collide

Why would a value of 500 km/s/Mpc for the Hubble constant contradict theories of stellar evolution

How do we know there was a big bang

In the late 1990's, it was discovered from distances of ___________ in distant galaxies that the expansion of the Universe is ___________.

One explanation of the dark sky Olbers's Paradox is that light can reach us only from objects in space out to a distance in light years _______ the age of the universe in years.

If the Universe were infinitely large, infinitely old, and static, then the CMB would appear uniform (i.e., homogenous and isotropic).

The observable Universe changes with the usage of new and better telescopes like the current Hubble and the future James Webb.

If the Universe is closed and finite, then

Cosmetologists are the astronomers and physicists who do research in cosmology.

-If the galaxy shown above has a 6.964 redshift, the galaxy is __________ and __________.