For decades, cosmologists have had an awkward number sitting at the center of their equations. The universe is expanding, and ...

Recent surveys hint that the rate of cosmic expansion changes dramatically over time; if that's true, then the universe could ...

Understanding the universe as a whole requires simulations on cosmic scales. An international team of astrophysicists, with a ...

A new cosmological study published in arXiv suggests the universe may have a dramatically shorter lifespan than previously ...

The cosmological constant has been a problem in physics since Einstein, but new research may show why it takes the value that ...

Cosmologists have spent decades trying to pin down exactly how fast the universe is flying apart and whether that rate is ...

According to physics, the universe and everything in it can be explained by just a handful of equations. They’re difficult equations, all right, but their simplest feature is also the most mysterious ...

Dark energy, which forms almost three-quarters of the universe, is the most mysterious stuff known to man. A new set of Chandra X-Ray Observatory data, however, has given scientists good information ...

The far distant fates of the Universe offer a number of possibilities, but if dark energy is truly a constant, as the data indicates, it will continue to follow the red curve, leading to the long-term ...

Do constants of nature—the numbers that determine how things behave, like the speed of light—change over time as the universe expands? Does light get a little tired traveling vast cosmic distances? It ...

Those of you who know my writing will know that I don’t use many analogies. Analogies have a very useful place in helping people understand difficult concepts, but they also have a tendency to be a ...

Cosmological expansion is widely treated as a proven fact. It is not proven. For nearly a century, cosmology has told a ...