beyond which nothing can be detected, as the signals could not have reached us yet. Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since ...

Beyond this protective layer lies space ... suggesting a finite yet unbounded structure. The observable universe—the part of space we can study—is limited by the speed of light and the ...

Beyond this point lies the cosmic microwave background radiation, the oldest light in the Universe, emanating from about 380,000 years after the Big Bang. While the observable Universe has ...

The way humans have observed the Universe has developed throughout history. At first the only information available was what could be observed by eye. The invention of the telescope meant that ...

What is beyond planet, star ... This is just a small part of the universe—less than 1% of the entire observable universe—but it is our galactic neighborhood. And it is good to know the ...