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?\n- background radiation is present.\n- galaxies exist outside of the milky way.\n- the expansion of the universe is accelerating.\n- 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?\n- background radiation is present.\n- galaxies exist outside of the milky way.\n- the expansion of the universe is accelerating.\n- gas giants form farther from the sun, where temperatures are cooler.

Answer

Brief Explanations:

The accelerating expansion of the universe suggests that there is a force (dark energy) counter - acting gravity and pushing galaxies apart at an increasing rate. This makes it less likely that gravity will pull galaxies back together for a reverse big - bang. Background radiation is evidence for the big - bang but not related to the future of the universe's expansion. The existence of galaxies outside the Milky Way is a basic fact about the universe's structure and not relevant to the expansion rate. The formation of gas giants is a phenomenon related to solar system formation, not the overall expansion of the universe.

Answer:

The expansion of the universe is accelerating.