there is a theory that gravity could pull galaxies back together, causing a reverse big bang. which…

there is a theory that gravity could pull galaxies back together, causing a reverse big bang. which observation makes this theory less likely than the idea that the universe may continue to expand?\no background radiation is present.\no galaxies exist outside of the milky way.\no the expansion of the universe is accelerating.\no gas giants form farther from the sun, where temperatures are cooler.

there is a theory that gravity could pull galaxies back together, causing a reverse big bang. which observation makes this theory less likely than the idea that the universe may continue to expand?\no background radiation is present.\no galaxies exist outside of the milky way.\no the expansion of the universe is accelerating.\no gas giants form farther from the sun, where temperatures are cooler.

Answer

Brief Explanations:

The accelerating expansion of the universe indicates that there is a force (dark - energy) overpowering gravity's pull. This makes it less likely that gravity will pull galaxies back together for a reverse big - bang. Background radiation is evidence of the big - bang but not relevant to the expansion or contraction debate here. The existence of other galaxies outside the Milky Way is a general fact not related to the expansion rate. The formation of gas giants is a solar - system related phenomenon, not relevant to the universe's overall expansion or contraction.

Answer:

The expansion of the universe is accelerating.