New video: where is all the ordinary matter?
Added 2020-08-01 01:08:14 +0000 UTCFor a long time, I thought most of the ordinary matter in our universe (so called baryonic matter that makes up you and me, stars and planets, gas, dust clouds etc) - I thought it was mostly accounted for. Only recently did I realize that most of it hasn't been detected... until now.
This video has a significant sponsor so it is an unpaid post. I also posted a video yesterday from the Kennedy Space Center in Florida, my first time watching a rocket take off - the payload for this one is headed to Mars: https://youtu.be/m85qDk849_o
Comments
What puzzles me is, if we think of fundamental forces as energy , and we do for the most part, gravity is also a fundamental force of an energy we cannot measure directly. So where does it's energy hide and could that make up some of the missing matter and energy we seem to be looking for?
veritanuda
2020-08-04 19:11:50 +0000 UTCHey, glad to see you back Derek, this is fascinating, I'd love to know how they actually count everything to any degree of accuracy? However more importantly I was kinda annoyed when I felt you sold out to a sponsor, the weight you gave to them at the beginning and in the written intro. It however made me feel like a scientist when I was delighted to see you explain at the end! They are brilliant, never seen a better fit for a channel, well done and thank you. Now I'm off to subscribe to Kiwico... Thanksπ
John Graham
2020-08-01 23:52:28 +0000 UTCGreat video. I was a bit lost by: 1) why the prevalence of deuterium to protons is 26 ppm where as Nudat show's its about 115 ppm (though it would need to be ~156ppm to get 1 in 6,000 https://youtu.be/Kp_kqamkYpw?t=165 ) ? And 2) how the ratio of deuterium nuclei to protons allows you to calculate the ratio of baryonic matter to photons... https://youtu.be/Kp_kqamkYpw?t=205 Really interesting stuff though, thanks!
AP
2020-08-01 08:05:14 +0000 UTC
