Why Is The Universe So Empty? (ft. PHD Comics!)

The video explores the vast structures of the universe, from galaxies to superclusters, and questions why the universe has any structure at all. It explains that early quantum fluctuations, amplified by cosmic inflation, led to the formation of these structures. The cosmic microwave background provides evidence of these early fluctuations. The video also discusses the ongoing battle between dark energy and gravity, which shapes the universe's future. Depending on the balance of these forces, the universe could either form superduper clusters or be torn apart.

What is the largest structure in the universe according to the video?

• A single mega galaxy

• Superduper clusters

• Superclusters connected by filaments

• A cluster of stars

In a perfectly uniform universe with no edge, what would a particle experience?

• It would feel gravity equally in all directions

• It would be pulled to the center

• It would move towards the edge

• It would experience no gravity

What process is responsible for stretching tiny quantum fluctuations across the universe?

• Gravitational pull

• Inflation

• Quantum entanglement

• Cosmic expansion

What evidence do scientists have for the early fluctuations in the universe?

• The speed of light

• The distribution of dark matter

• The cosmic microwave background

• Observations of current galaxy formations

How does dark energy affect the universe on the largest scales?

• It causes galaxies to merge

• It pulls everything apart

• It strengthens gravitational forces

• It creates new stars