New data from major dark-energy observatories suggest the universe may not expand forever after all. A Cornell physicist calculates that the cosmos is heading toward a dramatic reversal: after ...

“For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever,” says Tye, a professor emeritus at Cornell. A positive constant acts like a ...

The science communicator, a disciple of Stephen Hawking, believes it will be decades before we colonize Mars. But he says we ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...

This enormous chain of hundreds of galaxies—a cosmic filament—is twisting through space 400 million light-years away ...

Faint structures play a crucial role in cosmic development, and scientists are only just beginning to grasp their full extent and role in shaping the universe.

The universe has delivered the loudest gravitational wave ever recorded, and it appears to have given Einstein’s theory of ...

They are massive, and extremely dense. They rip apart anything and everything that gets close to them. Their gravity is so ...

The big bang wasn’t the start of everything, but it has been impossible to see what came before. Now a new kind of cosmology is lifting the veil on the beginning of time ...

Of the thousands of single-star systems in our galaxy, around 10% are known to have planets. Scientists thus expected about ...

The research team used two distributed sensors and leveraged two quantum resources for increasing detection sensitivity: ...

The puzzle Einstein and Rosen were addressing was never about space travel, but about how quantum fields behave in curved spacetime. I ...