Exam 14: Modern Cosmology

Astronomers have found the center of the Universe to be located in

Observations of Type Ia supernova indicate that the universe is static.

Measured ages of globular clusters suggests that the Universe is about

The cosmological principle states that the Universe is I. expanding. II. accelerating. III. homogeneous. IV. isotropic.

Which of the following is a force of nature?

Which of the following types of Universe has no center and no edge?

Large scale structures of the Universe include ___________.

In the above observations of the CMB, the mottled (i.e., non-uniform) appearance is due to ___________ in a/an ____________ Universe.

By adding the cosmological constant, Einstein made the universe steady in that the Universe neither expanded nor contracted.

Since the big bang, but before now, a time existed where matter was not dominant.

As the Universe cooled, it eventually reached a temperature of 3,000 K and protons were able to capture and hold electrons to form neutral hydrogen. This process is known as

The ___________ is that the Universe is both isotropic and homogeneous.

In the late 1990's, it was announced that the expansion of the Universe is accelerating. What does this imply from the perspective of the big bang?

How do we know there was a big bang?

What observational evidence supports the fact that our universe is static and unchanging?

If the average density of the universe is less than the critical density, the Universe is open.

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

Deuterium and lithium-7 are part of the 4.5% normal matter.

Why is the cosmic microwave background (CMB) so cold if the early Universe was so hot?

If the density of the universe is equal to the critical density, and H equals 50 km/s/Mpc, then the true age of the Universe is 13.3 billion years.