As far as scientists know, these phenomena are the most powerful in the universe and are short-term eruptions of light and ...

Thus, we are surrounded by a "horizon" that we cannot look beyond—a horizon set by the distance that light can travel over the age of the universe. This horizon describes the visible universe ...

Inflation was introduced to explain why different parts of the universe appear similar even though they are too far apart for any causal connection — that is, there has not been enough time for ...

Galaxies in the early universe tend to be clumpy, but the new JWST discovery of a "grand design" spiral galaxy just 1.5 ...

But from where Earth sits in the observable universe, our view extends more than 13 billion years into the past. Far outside our Local Group, astronomers have found galaxies so metal-poor and so ...

Distances to objects in the universe are measured indirectly and ... The amount that an object appears to shift is determined by the distance to the object being observed and the distance between ...