However, the mysteries of the cosmic horizon, or the observable edge of the universe, are still unresolved.
As the name implies, the visible universe is a part of human space that can be observed from modern observatories. As astronomical visibility improves over the centuries, it is also time for scientists to discover that going into space is also the way to travel to the past.
For example, if you look at a star 8 light years from Earth like Sirius, the image in your eye is the Sirius eight years ago.
The observed universe is only a very small part compared to the infinite vast and infinite size of the entire universe. Revealing the mysterious curtain of the space above is the human mission set out.
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