Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

WASHINGTON — Using data from NASA’s Wilkinson Microwave Anisotropy Probe (WMAP), scientists have identified an unexpected motion in distant galaxy clusters. The cause, they suggest, is the ...

This story is part of our Cosmic Perspective series, in which we confront the staggering vastness of the cosmos and our place in it. Read the rest of the series here. In a sense, we are at the centre ...

About 13.8 billion years ago, the origin of the universe began with the Big Bang. Scientists say all space, time, matter, and ...

The universe is generally referred to as infinite, unknown, and limitless. With over 2 trillion galaxies and millions of stars and planets, the universe is so enormous that it stretches the boundaries ...

Astronomers have uncovered a hidden population of dusty galaxies that formed just one billion years after the Big Bang, offering a new glimpse into the universe’s formative years. An international ...

We know the Universe is big. But just how big is it really? And how could we ever measure something as ephemeral as the cosmos? This new video by the ever-popular Minute Physics takes a stab at these ...

The edge of the universe is not a wall, but a limit defined by time, light, and expansion. What we call the observable ...