"For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever," Tye says. "The new data seem to indicate that the cosmological constant is ...

A new study predicts the Universe will stop expanding in 11 billion years and collapse in a "Big Crunch" around 20 billion years from now.

Astronomers have captured the most detailed view yet of a red supergiant star just before it exploded, hidden beneath layers ...