If dark matter is undetectable as some believe, why to chemists detect it everyday in the cryo labs???

Question

Liquid helium at super extreme cold temperatures is STILL a noble gas, and noble gases as any scientist,or chemist should know, NEVER reacts in nature with other elements!!! I think astrophysicists and others on this board will sooner or later come around to the same conclusion I did earlier, that dark matter is nothing more then extremely cold noble gases, such as helium, that surrounds the 'outer limits' or outer edge of all galaxiies and intergalaxic space!!! Now how would we go about 'detecting' rarified, extremely cryogenic noble gases, at the great distances of intergalaxic space??!!! Eureka! Dark matter!!!!!

Answer 1

Helium may be a noble gas, but it isn't dark.  It interacts with the electromagnetic field and has spectral lines not so terribly unlike hydrogen's.  Helium was first discovered, not on earth, but on the Sun via spectroscopy.

Moreover, this dark matter stuff doesn't seem to react any way with anything except for by gravitation.  It doesn't even scatter off of itself or anything else.  This is why it's still pretty much in a ball around the galaxy and hasn't settled into a disk like everything else.

So good idea, but no.

Answer 2

chemistry doesnt apply to space at all. not one single bit.

no atoms in space are close enough to chemically react. what astronomers focus on is the light emitted. cold helium still emits light.

and if noble gases somehow make up dark matter, you have some explaining to do. why is it that previously, helium was thought to be something like 25% of the universe and that fit with all observations. all other elements were less than 2 percent of the rest of the universe. now could you explain why noble gases currently make up less than 26% of the universe, but in your model they make up more than 90%?

temperature means nothing. the temperature of an element doesnt effect its ability to emit light, not at all.

why is it that every kid in high schools that learns something new in class thinks they can solve mysteries that puzzle physicists and astronomers with PhD's?

Answer 3

the only presence found of dark matter is gravitational. there are slight gravitational inconsistencies in space, so they concocted dark matter as a scapegoat!

Answer 4

If the gas was in free space round a galaxy (or anywhere else in space for that matter) it would be heated by incident radiation from it's sourroundings. Once heated it would then radiate that energy back out until it reached a stable temperature. We would then be able to 'see' the gas by this radiation.

If the gas, even in a rarified state, was between us and a galaxy or star we would still be able to detect it by it's abosbtion spectrum (in order to make up the mass difference required of darkmatter there would have to be an awful lot of it).

Answer 5

Dark matter is a subject of physics. not chemistry.