Across our Milky Way cosmic system, distances are estimated as far as what amount of time it requires for light to travel. The closest star is north of four light-years away. So when we see that closest star, we see it not as it is today, but rather as it was four years prior. We are seeing the light that left that star four years beforehand and is simply contacting us now.
Cosmic systems are yet farther away in both reality. Our closest huge neighbor world, Andromeda, is around more than two million light-years away. The Virgo Cluster of universes is the biggest close by assortment of worlds, at around 60 million light-years from the Milky Way. The light we see today from universes in the Virgo Cluster began its way toward us simultaneously as the age of the dinosaurs was finishing on Earth. In the event that you were in a Virgo Cluster universe today, and you had a telescope sufficiently strong to concentrate on the Earth, you would have the option to see the ancient reptiles.
Conclusion :- James webb space telescope can see past
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