Dark Energy (18 Q trim)

Front

What is dark energy?

Back

Dark energy is the unknown force or energy that tends to accelerate the expansion of the universe.

Front

What is the singularity in cosmology?

Back

The singularity refers to the state of the universe when it was a single, infinitely dense point before the Big Bang.

Front

How does gravity behave on small scales in the universe?

Back

On small scales, gravity can overcome the expansion of the universe.

Front

What happens to galaxies on large scales in the universe?

Back

On large scales, all galaxies are moving away from each other as space expands between them.

Front

What is the current understanding of the universe's expansion?

Back

The universe's expansion is getting faster every day.

Front

What is the relationship between dark energy and the expansion of the universe?

Back

Dark energy is believed to be responsible for the accelerated expansion of the universe.

Front

What is the Big Bang theory?

Back

The Big Bang theory is the leading explanation for the origin of the universe, stating it began from a singularity and has been expanding ever since.

Front

What evidence supports the existence of dark energy?

Back

Observations of distant supernovae and the cosmic microwave background radiation suggest that the universe's expansion is accelerating, indicating the presence of dark energy.

Front

What role does dark energy play in the fate of the universe?

Back

Dark energy influences the ultimate fate of the universe, potentially leading to scenarios like the Big Freeze or Big Rip.

Front

What is the cosmological constant?

Back

The cosmological constant is a term introduced by Einstein in his equations of General Relativity, representing a constant energy density filling space homogeneously.