For example if the Betelgeuze system had a planet, with a theoretical large telescope on that planet and looked back at earth. It would see life and civilizations from the 15th century a.d. (~500 light years distance)
For example if the Betelgeuze system had a planet, with a theoretical large telescope on that planet and looked back at earth. It would see life and civilizations from the 15th century a.d. (~500 light years distance)
Sorry to be the “um, actually” guy, but life on any planet other than Earth has not been confirmed. There have been some signs that there MAY be life elsewhere, but nothing conclusive.
As a layperson, there seems to be a general consensus that, given the vast nature of the universe, life on other planets may be likely. We just can’t say “for a fact that other planets exist with life”.
I’ll be happy to be proven wrong if you’ve got a source.
I just remember reading about it every few years. They’ve found several earth like planets. One I read about in 2014 said it was so similiar to earth that they unofficially nicknamed it “Earth 2”. They found another earth like planet that same month, but it’s size was so different that they made the joke it couldn’t be Earth 3, but based on size it might be Earth 5 (with the joke being the planet was like 2 earths combined).
But our technology was good enough to see the planet is green and blue, indicating life. But our technology wasn’t good enough to zoom in to see what that life looks like. But we know it’s out there.
Earth like just means it’s the right size, in the right spot away from a star (in what’s known as the habitation zone) that it could maybe possibly support the life we know about here on Earth. It does not mean it is actually like Earth.
All we can really “see” about them other than their position, is the elemental makeup by looking at the wavelengths of light bouncing off it and that can tell us things like that it might have a nitrogen-oxygen rich atmosphere. But we don’t know if there are plants or animals or any kind.