"I think that the is ordinary matter. I don't think we need any fancy stuff like the Big Bang people need. The Big Bang people needed all that fancy stuff because their inflationary models said that it has to be in there... [T]hen they ran into this difficulty... If there's all that extra stuff in here, out of which and could be made, then the Big Bang model is wrong. ...If all this extra matter is ordinary matter, then the helium abundance is not ok for the Big Bang model! So then they had to invent that this dark matter responds only to gravity. I was having dinner with a physicist... I said in that case why didn't it fall into the galaxy? ...[H]e said, "It can't fall into anything without getting rid of its gravitational energy, and it has no way to do that." So what's the use of the dark matter? It can't do anything. ...[T]hat's the problem with the dark matter..."
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Hindus from the United StatesUniversity of California, Berkeley alumniAstronomers from the United States
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John Dobson (amateur astronomer)
John Lowry Dobson (14 September 1915 – 15 January 2014) was an American amateur astronomer and is best known for the Dobsonian telescope, a portable, low-cost Newtonian reflector telescope. He was also known for his efforts to promote awareness of astronomy (and his unorthodox views of physical cosmology) through public lectures including his performances of "sidewalk astronomy". Dobson was also the co-founder of the amateur astronomical group, the San Francisco Sidewalk Astronomers.
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