If Ω_mass = 0.5 today and there were no dark energy,the universe would: A)expand forever B)slow its expansion but never reverse it C)stop expanding and eventually collapse D)oscillate between expansion and collapse E)expand so quickly that the universe is ripped apart

Question

Quizplus · Accepted Answer

If Ω_mass = 0.5, it means the density of the universe is less than the critical density needed to stop expansion. Without dark energy, the universe would continue to expand forever, as it is not dense enough to eventually collapse.

If Ωmass = 0

If Ω_mass = 0