Question

predicting the future of the universe
which hypothesis is most supported by astronomers?
the universe is currently expanding and will continue to expand.
stars could burn out, causing the universe to become dark and cold.
gravity could pull galaxies back together, causing a reverse of the big bang.
dark energy will pull the universe together to form a massive black hole.

Explanation:

Astronomers have observed that the universe is expanding, and current evidence supports that this expansion will continue. The discovery of dark energy, which acts as a repulsive force countering gravity, further backs this. While other hypotheses like stars burning out (heat - death) or a "big crunch" (reverse big - bang due to gravity) are theoretical, the most widely - supported view based on observational data (such as redshift of distant galaxies indicating expansion) is the continued expansion. Dark energy is thought to drive the acceleration of the expansion, not pull the universe into a black hole.

Answer:

The universe is currently expanding and will continue to expand.