1564
Sea Level
(imgs.xkcd.com)
Alt text: They're up there with coral islands, lightning, and caterpillars turning into butterflies.
It honestly makes me feel lucky being born when I was.
We also get to see the after effects of the big bang which won’t be detectable for the majority of the lifetime of our universe.
The big bang part is interesting, because, if humans become successful and manage to somehow make some sort of long-lasting archive that would survive on universal scales, we would be the ancients with old revelations to a potential future species. Able to impart knowledge that would have been undetectable for them, and an ancient map of the stars containing visions of countless other galaxies, and a peek into the very beginnings
Though, realistically, it's likely that a hypothetical hyper-advanced technological species would have their ways of prodding the true nature of our universe, despite the greater challenges
Child you elaborate on the second point? Why is it only visible in a short period?
Cause the expansion of the universe. Eventually we won’t be able to see beyond our own galaxy.
Aha I see