Future Fates of the Universe Flashcard

Front

What is the Big Crunch?

Back

A possible future fate of the universe where dark energy reverses, leading to the universe collapsing back into a singularity.

Front

What is Indefinite Expansion?

Back

A future fate of the universe characterized by continuous expansion due to a cosmological constant, where the universe expands forever.

Front

What does the Big Bounce model propose?

Back

It suggests that the Big Bang was not the beginning, but rather the result of a previous universe collapsing.

Front

What is the final stage of the Big Rip?

Back

Atomic Scales, where all matter is torn apart at the atomic level due to extreme expansion.

Front

What does the Accelerating model of the universe involve?

Back

It involves dark energy driving rapid, endless expansion of the universe.

Front

What is dark energy?

Back

A mysterious form of energy that makes up about 68% of the universe and is responsible for its accelerated expansion.

Front

What is the Big Bang?

Back

The leading explanation for the origin of the universe, proposing that it began from an extremely hot and dense state.

Front

What is the concept of cosmic scales?

Back

Refers to the large-scale structure of the universe, including galaxies and clusters of galaxies.

Front

What is the difference between open, closed, and flat universe models?

Back

Open models allow for infinite expansion, closed models eventually collapse, and flat models expand at a constant rate.

Front

What is the significance of the cosmological constant?

Back

It represents the energy density of empty space, influencing the rate of expansion of the universe.