How Many Galaxies Are There?

The video explores the history and challenges of estimating the number of galaxies in the universe. Initially, estimates ranged from 100 to 200 billion galaxies based on Hubble's observations. However, a 2016 study suggested there could be two trillion galaxies, using advanced models and data from early universe studies. The video discusses the role of redshift, galaxy mergers, and the limitations of current technology. Future telescopes like the James Webb Space Telescope may provide more accurate data, but the total number of galaxies remains unknowable due to the universe's expansion.

What new findings were presented in the 2016 paper published in the Astrophysical Journal?

Discuss the implications of the universe's expansion on our ability to observe galaxies.

What advancements are expected from the James Webb Space Telescope?