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+--- Thread: 5 Ways To Make A Galaxy With No Dark Matter + Is Humanity Unusual In The Cosmos? (/thread-5134.html)
5 Ways To Make A Galaxy With No Dark Matter + Is Humanity Unusual In The Cosmos? - C C - Apr 3, 2018
5 Ways To Make A Galaxy With No Dark Matter
https://www.forbes.com/sites/startswithabang/2018/04/02/5-ways-to-make-a-galaxy-with-no-dark-matter/#554c93604498
EXCERPT: Last week, astronomers announced the discovery of NGC 1052-DF2: a galaxy without dark matter. While most galaxies have much more dark matter than normal matter, this one, found nearby a giant elliptical, has practically none. It's the first of its kind, but doesn't defy theories. Here are 5 ways to make "DF2"...
MORE: https://www.forbes.com/sites/startswithabang/2018/04/02/5-ways-to-make-a-galaxy-with-no-dark-matter/#554c93604498
Is Humanity Unusual In The Cosmos?
https://www.npr.org/sections/13.7/2018/04/02/598813352/is-humanity-unusual-in-the-cosmos
EXCERPT: . . . [Avi] Loeb and [Manasvi] Lingam have explored a number of different ways we might find markers of another civilization. [...] Loeb is essentially optimistic about the search. "We humans are probably not special," he said, explaining that with so many planets in the universe, the rise of civilizations may not be so usual. But Loeb's belief that we are "not special" takes a back seat to his scientific dedication to data. "I give the final say to the facts," he said. So, for Loeb, the effort now should be developing search technologies and strategies so we can just go out and look.
And that's what makes our moment in history so unique. We are poised to start staring at exo-planets and their environments in all kinds of new ways. What do you think we're going to find?
MORE: https://www.npr.org/sections/13.7/2018/04/02/598813352/is-humanity-unusual-in-the-cosmos
RE: 5 Ways To Make A Galaxy With No Dark Matter + Is Humanity Unusual In The Cosmos? - Syne - Apr 3, 2018
The age of the universe alone weighs the odds heavily against finding "markers of another civilization".