we can’t really see the Big Bang because the universe was so hot and dense that light was not free to move. The farthest we can see is light 400,000 years younger than that, but it’s very ...

Is the universe flat and infinite, or something more complex? We can’t say for sure, but a new search strategy is mapping out ...

Because we haven't found anything yet, we've started to wonder if dark matter might be lighter or heavier than we thought.

While we can never directly "see" the whole of the universe or glimpse its farthest horizons, we can discover how it is behaving—how fast it's growing, whether its growth will one day come to a ...

A "cosmic CT scan" performed by scientists using two very different cosmic surveys has revealed the cosmos is less clumpy and ...

If the universe is 13.6 billion years old, how can astronomers ... Way (the farthest object visible to the naked eye). Go farther out — using telescopes — and it's possible to see things ...

But this will be so far in the future that our sun will ... Most of the mass that we can currently see in the universe will be contained in stars that have blown up and collapsed into black ...