Why is the universe expanding at an ever-increasing rate? This is one of the most exciting yet unresolved questions in modern ...

After a century of observations spanning the breadth of the cosmos and theoretical insights that push humanity's vision of ...

On human timescales, the universe may as well be eternal. It’ll be here long after our species and our planet are gone, but ...

Scientists figured out that the universe is billions of years old — after years of reading ancient rocks and dying stars, and ...

The team explores one of the greatest discoveries of modern astronomy - that our universe is expanding - and the new questions it raises about how the cosmos works. The team explores one of the ...

For two decades, scientists believed the cosmological constant, known as λ (lambda), was positive. That meant the Universe ...

Astrophysicists have presumed for nearly a century that the universe will just keep expanding for all eternity, driven by an ...

Modern cosmology reveals a universe expanding uniformly without a spatial center or edge. The Big Bang wasn't a localized explosion but a simultaneous ...

The “dark energy” field that has fueled the expansion has been weakening over the past 4 billion to 5 billion years, new data shows.

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

If recent discoveries that dark energy is evolving hold any water, our Universe will collapse under its own gravity on a finite timeline, new calculations suggest.