Observable universe

Visualization of the 93 billion light year, observable universe.

In Big Bang cosmology, the observable universe consists of the galaxies and other matter that humans can in principle observe from Earth in the present day.

You may ask, where is computing in that case?

Here is your answer:

The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region, but the same technology allows us to "see" light from as far back as the particles emit the photons.

The Hubble Space Telescope as seen from the departing Space Shuttle Atlantis.

The Hubble Space Telescope was carried into orbit by a Space Shuttle in 1990 and remains in operation. Hubble's orbit outside the distortion of Earth's atmosphere allows it to take extremely sharp images with almost no background light. Hubble's Ultra-Deep Field image, for instance, is the most detailed visible-light image ever made of the universe's most distant objects. Many Hubble observations have led to breakthroughs in astrophysics, such as accurately determining the rate of expansion of the universe.