In Big Bang cosmology, the observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth in the present day—because light (or other signals) from those objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction.
All stories in Observable universe
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Astronomers just discovered the oldest and most distant galaxy ever
As astronomers look deep into space, they also see far back in time. Now, astronomers at the University of Tokyo may ...
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Scientists say supermassive black hole once belched a crater into a nearby galaxy
We've seen what happens when stars go supernova and suns explode but scientists believe the biggest explosion in the history ...
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Scientists are looking for dark matter to understand the universe’s ‘hidden web’
After counting all the normal, luminous matter in the obvious places of the universe – galaxies, clusters of galaxies and ...
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Study: Bizarre 'dark fluid' with negative mass could dominate the universe
Negative masses are a hypothetical form of matter that would have a type of negative gravity – repelling all other material ...
