We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the present-day expansion rate of the universe, known as the Hubble constant. These ...

One of the largest known stars in the universe underwent a dramatic transformation in 2014, new research shows, and may be preparing to explode. A study led by Gonzalo Muñoz-Sanchez at the National ...

Two aging stars in the binary system AFGL 4106 sculpt a glowing, egg-shaped nebula as they approach the end of their lives. Astronomers have captured a spectacular scene of two ageing stars sculpting ...

A groundbreaking discovery has revealed ancient, dusty galaxies formed just one billion years after the Big Bang. Using the latest technology, astronomers found these galaxies at the universe’s edge, ...