Dark Matter

The video discusses the concept of dark matter, which constitutes 25% of the universe's energy and matter, compared to the 5% made up of ordinary matter. Dark matter is detected through its gravitational effects, and its existence challenges our understanding of gravity. Historical examples, such as the discovery of Neptune and the precession of Mercury, illustrate how missing mass and revised theories have shaped our understanding of the universe. The video raises questions about whether dark matter exists or if our theories of gravity need revision.

What percentage of the universe is made up of ordinary matter?

• 50%

• 25%

• 5%

• 75%

How do scientists currently detect the presence of dark matter?

• Through its gravitational effects

• By observing its light emissions

• Using magnetic fields

• Through sound waves

Which theory is primarily used to infer the existence of dark matter?

• Newton's theory of gravity

• Quantum mechanics

• Einstein's theory of gravity

• String theory

What was the outcome of Le Verrier's hypothesis about a planet beyond Uranus?

• It led to the discovery of Pluto

• It led to the discovery of Neptune

• It was proven incorrect

• It resulted in the discovery of Vulcan

What was the incorrect planet hypothesized by Le Verrier to explain Mercury's orbit anomaly?

• Vulcan

• Neptune

• Mars

• Pluto