Recent observations by the James Webb Space Observatory discovered six massive galaxies formed 600 million years after the Big Bang, challenging existing models of the universe's age.
Dark energy and the universe's expansion allow us to see galaxies up to 46 billion light years away, but beyond that, objects are unreachable due to space expansion.
The effects of special relativity, including time dilation, come into play as a spaceship approaches the speed of light.
Galaxies between 46 and 61 billion light years away are currently invisible and unreachable, even for future generations.
More than 96.7% of galaxies we observe today have already disappeared, and we'll never see their light.
Of the theoretical 4.7 trillion galaxies, only about 66 billion remain within our reach for observation.
The discovery of six massive galaxies formed 600 million years after the Big Bang challenges current cosmological models and suggests the universe might be much older than previously thought.
Distant galaxies can move away from us faster than the speed of light due to the expansion of space, and the same principle applies to a spaceship trying to return to Earth.