TagCopernican Principle
Physicist: If Humans Died Out, the Galaxy Might Lose All Meaning
Ahead of a big climate change conference, Brian Cox assesses the prospect of other habitable planets or their civilizations much more soberly than we often hearAhead of the big climate change conference COP 26 (31 Oct – 12 Nov 2021), physicist and broadcaster Brian Cox offers an ominous warning which also raises some questions. Speaking in connection with his new series, Universe, he presents a starkly different picture from much that we hear: Humans might be the only intelligent beings in our galaxy, so destroying our civilisation could be a galactic disaster, Prof Brian Cox has warned leaders in the run-up to Cop26. Speaking at the launch of his new BBC Two series Universe, the physicist and presenter said that having spoken to the scientists around the world advising the show, he thought that humans and sentient life on Earth “might be a remarkable, naturally Read More ›
Physicist: Copernican Principle Doesn’t Make Earth Insignificant
That, Marcelo Gleiser says, is a philosophical attitude, unrelated to the scienceTheoretical physicist Marcelo Gleiser, author of The Island of Knowledge (2014) offers some thoughts on what the Copernican Principle means and doesn’t mean about Earth’s status as a planet — whether Earth is a special place or a pale blue dot. He has no objection to the Copernican Principle (“a cornerstone of astronomy”) as such. The problem, he points out, is what happened next: Copernicus famously proposed that Earth was not the center of the universe; the sun was. The Earth, he suggested, was just another planet orbiting the sun like Mars or Jupiter… The principle, as understood today, is usually stated as, “Earth is an ordinary planet, and we, human observers, are ordinary too.” There is nothing special about Read More ›
Maybe There Are Just Very Few Aliens Out There…
The Rare Earth hypothesis offers science-based reasons that life in the universe is rareRecently, science and science fiction writer Matt Williams has been writing a series at Universe Today on why extraterrestrial intelligences never make contact with us. Last week, we looked at the hypothesis that, to avoid the heat destruction of their advanced technology, the aliens have put themselves into a digital slumber until the universe cools down. This week, let’s look at a quite different approach, which Williams outlines in “Beyond “Fermi’s Paradox” IV: What is the Rare Earth Hypothesis?” (July 29, 2020): That is “the possibility that life-bearing planets like Earth are just very rare.” We don’t see aliens because they are very uncommon: This is what is popularly known as the “Rare Earth Hypothesis,” which argues that the emergence Read More ›