Dark Matter Question
Discussion
I enjoy the Sea channel on Youtube: https://www.youtube.com/@sea_space
In his video about Dark Matter he tells how it is (so far) undetectable because it doesn't interract with anything. Scientist are very confident that it exists though, or at least that *something* exists to account for the configuration of the universe. 5/6ths of all matter speculated to be Dark Matter (or "missing mass" as he describes it).
My question then is how is this stuff so undetectable if it interracts with entire galaxies to shape the universe?
In his video about Dark Matter he tells how it is (so far) undetectable because it doesn't interract with anything. Scientist are very confident that it exists though, or at least that *something* exists to account for the configuration of the universe. 5/6ths of all matter speculated to be Dark Matter (or "missing mass" as he describes it).
My question then is how is this stuff so undetectable if it interracts with entire galaxies to shape the universe?
Eric Mc said:
Dark matter is deduced through its gravitational effects. So it does interact with other matter in the universe. in fact, it's the interation that suggests it exists in the first place.
Yes, that's what I can't get my head around. Gravitational effects on entire universes but doesn't intereact with anything that we can throw at it.All very interesting, and maybe I'm getting his videos on dark matter and dark energy mixed up.
It just feels to me (and I'm no scientist) that there's a hint of Victorian "Ether" or Einstein's "Cosmological Constant" at play here. Based on the comments above, it seems to be dark energy where that comparison is more appropriate.
This actually raises something I have often wonder about. I remember that the Victorians thought they knew almost all of how science worked, and that everything there was to know would soon be known. In other words, they didn't know what they didn't know. I wonder therefore if here in the 21st century, our scientists are more aware than the Victorians were at the limited extent of their knowledge.
It just feels to me (and I'm no scientist) that there's a hint of Victorian "Ether" or Einstein's "Cosmological Constant" at play here. Based on the comments above, it seems to be dark energy where that comparison is more appropriate.
This actually raises something I have often wonder about. I remember that the Victorians thought they knew almost all of how science worked, and that everything there was to know would soon be known. In other words, they didn't know what they didn't know. I wonder therefore if here in the 21st century, our scientists are more aware than the Victorians were at the limited extent of their knowledge.
Gassing Station | Science! | Top of Page | What's New | My Stuff