Terms of Service and Privacy Policy. The prevailing consensus in astrophysics is that the universe has spent the past 13-or-so billion years expanding outward in all ...

How big is the universe ... of inflation comes into play. Now about two decades old, inflation entertains the idea that there is a kind of energy that causes space to expand.

Dark energy makes up roughly 70 percent of the universe, yet we know nothing about it. Around 25 percent of the universe is the equally mysterious dark matter, leaving just five percent for everything ...

while dark energy pulls them apart by making the universe expand faster and faster over time. Because looking into distant space also means looking back in time, Euclid allows scientists to track ...