Summary:
- The universe is currently expanding and will continue to do so indefinitely, but the ultimate fate of the universe remains uncertain.
- One possibility is that the universe will continue expanding and eventually reach a state of "heat death," where all stars have burned out and the universe is filled with a uniform cold emptiness.
- Another possibility is that the universe could eventually start to contract, leading to a "big crunch" where all matter is compressed back into a singularity, potentially leading to a new cycle of expansion and contraction.