How big is the Universe? Is it finite or infinite? These questions have puzzled astronomers, scientists, and curious minds ...

For centuries, we’ve looked up at the stars and wondered if the universe is infinite. We know there is a visible boundary of what we can observe, defined by how far light has traveled since the Big ...

A team of scientists is proposing a bold alternative to the Big Bang theory, suggesting that our universe may have formed ...

Scientists say the Universe has no edge, but that doesn't mean it's infinite. A Manchester astrophysicist explains what we ...

However, the observable universe extends farther than 13.8 billion light-years in every direction because, for all the time space has existed, it’s also been expanding.

If you wait even longer, eventually the stars will all burn out – stars like the sun last only about 10 billion years.

Think of a mystery musical instrument. If a physicist is told the loudness of the sound it makes at every possible frequency, ...

A controversial theory suggests the observable universe is the result of matter rebounding after the collapse of a black hole in another parent universe. By Darren Orf Published: Jun 13, 2025 2:00 ...

The spins of some early galaxies could be a clue that the entire observable universe exists within a black hole—except, that is, for all the evidence to the contrary. Skip to main content.

The universe is 13.8 billion years old, but the observable universe stretches more than 13.8 light-years in every direction. That's because the universe is expanding and light got a head start ...

We just got the clearest snapshot yet of the first light that streamed through the Universe. After five years of staring unblinking at the sky, the Atacama Cosmology Telescope (ACT) has compiled ...

There are so many stars in the universe—hundreds of billions of them in our galaxy alone, which is, in turn, one of some 125 billion galaxies in the observable universe—that it would be ...