In one new theory, it is possible that dark matter exists in a mirror universe where there are only dark versions of forces ...

What they lack in visual splendour, a number of fainter stars more than make up for in cosmic importance, Nigel Henbest writes ...

What could we choose as the seven most remarkable celestial objects visible either with our eyes or with a small telescope?

Since conventional explanations have failed to pony up dark matter, one physicist is looking towards the unconventional.

However, the visible universe today is 93 billion light-years across, with Earth at its center (the concept of a "visible" universe is very observer dependent — observers in different parts of ...

Let’s start with the number of galaxies in the visible universe. The volume we are considering spans 93 billion light-years across.

The James Webb Space Telescope has found perhaps its most profound discovery to date. The uncovered preferred direction for galaxies supports the idea that the universe was born in a black hole.

NASA data shows possibility that we exist within a black hole. And that our universe might not the only universe in existence.

It might be lurking in a dark mirror universe contained within the visible universe. The merging of dark matter black holes in that realm may cause gravitational waves which can be detected.

However, the visible universe today is 93 billion light-years across, with Earth at its center (the concept of a "visible" universe is very observer dependent — observers in different parts of ...