True or False: Before modern astronomical observations, the scientific consensus was that the universe was static and that galaxies occupied fixed positions relative to one another.

Using Hubble's Law ${v = H d}$ if a galaxy is moving away at a speed of ${14,000\ \text{km/s}}$ and the Hubble constant is ${70\ \text{km/s/Mpc}}$, how far away is the galaxy?

The Cosmic Microwave Background Radiation (CMBR) is remarkably uniform, meaning it is detected with nearly the same intensity from all directions. What does this uniformity suggest about the early universe?

A specific spectral line from a stationary source in a laboratory has a frequency of $6.0 \times 10^{14}\ \text{Hz}$. When observing the same line from a distant galaxy, an astronomer measures a frequency of $5.0 \times 10^{14}\ \text{Hz}$. Based on the wave relationship , what is the percentage change in the wavelength of the observed light compared to the source light?

When observing light from a distant galaxy, astronomers notice that the light waves are 'stretched' to longer wavelengths. According to the Doppler effect, what physical mechanism causes this stretch?