Understanding the universe’s expansion can be quite perplexing, especially when we try to envision what it’s expanding into. Unlike everyday experiences where objects expand into surrounding space, ...

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

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don’t ...

Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the so-called "Hubble tension." ...

It is widely thought that our universe is expanding at an ever-accelerating rate. But could we have that wrong? That is what a group of scientists from South Korea claims, but other scientists have ...

That the universe is expanding has been known for almost a hundred years now, but how fast? The exact rate of that expansion remains hotly debated, even challenging the standard model of cosmology. A ...

For more than two decades, the standard model of cosmology has stood as a reliable guide to the universe. Known as Lambda Cold Dark Matter, or ΛCDM, it weaves together dark energy, dark matter, and ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be straightforward. Objects are still emitting light, and that light takes time to travel ...

A rare gravitationally lensed supernova called SN 2025wny appears in five separate images due to the gravity of two ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. The prevailing consensus in astrophysics is that the universe has ...

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

Dark energy is by far one of the most intriguing aspects of the cosmos that scientists are still trying to fully decode. While we're pretty sure that the universe is held together by the mysterious ...