Are there galaxies we will never see?

In other words, in the future, we will have a total of 4.7 trillion galaxies to view. And 4.634 trillion of them are already forever unreachable, even at the speed of light. As the Universe expands, evolves and accelerates, no information is ever destroyed as it passes over… [+]

Will we ever be able to see the edge of the Universe even with our best space telescopes?

We can look as far away as our telescopes can take us, but there will always be a fundamental limit. Even if space itself is infinite, the amount of time that’s passed since the hot Big Bang is not. No matter how long we wait, there will always be an “edge” that we’ll never be able to see past.

How much of the Universe is inaccessible?

94\%
Given that we can see for 46 billion light-years in all directions, that means that already, only 6 billion years into the era of dark energy dominance, 94\% of the presently observable Universe is already permanently unreachable.

How long until we can no longer see other galaxies?

In another 100 billion years or so, we won’t be able to reach a single galaxy beyond our Local Group at all.

Why will some light never reach Earth?

Their photons will simply be lost traveling in space, never reaching a destination (This is why faster than light travel is necessary if we ever hope to even reach the outskirts of our own galaxy, let alone others).

Can we ever reach the end of the universe?

Yet even if we imagine a future where we can do exactly that, there are still parts of the Universe that will be forever inaccessible to us. If the Universe were static, constant and forever unchanging, then all it would take was time to reach even the most distant object we could fathom.

Why can’t we see the entire universe outside the Earth?

Outside that sphere is more Universe, a hidden, censored Universe. Universe that we can’t see because the light hasn’t reached us yet. Fortunately, every year that goes by, a little less Universe is redacted from the record, and the sphere we can observe gets bigger by one light-year.

Is the universe expanding or cooling?

If this were the case, then the Universe should not only be expanding but cooling, as the wavelength of light would be stretched to lower and lower energies as time went on. We should see a leftover glow with particular properties dating back to the earliest times: the cosmic microwave background. We should see an evolving web of cosmic structure.

What is the observable universe?

The part of the universe of which we have knowledge is called the observable universe, the region around Earth from which light has had time to reach us. One famous analogy to explain the expanding universe is imagining the universe like a loaf of raisin bread dough.