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6 votes

How did Kelvin square his low estimate of the age of the sun with the geological evidence?

Kelvin did think that "uniform density with a fudge factor" was good enough. The more detailed considerations of the density profile were made by T.J.J. See in 1899, where he used the "...
Conifold's user avatar
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3 votes
Accepted

Earliest use of the word 'polytropic' to describe an equation of state or process

The best source of word origins and their earliest usages is the Unabridged Oxford English Dictionary. You need a library subscription. The first meaning could be of mathematical original since n ...
AChem's user avatar
  • 4,079
2 votes

Earliest numeric value for helium D3 line

The earliest references that I can find about the measurement of helium D3 line is D'Arrest, H. L. (1872). Über die Position der Lichtlinie D3 im Protuberanzspectrum. Astronomische Nachrichten, 79, 1. ...
AChem's user avatar
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1 vote

What did the Italian Nobel laureate Riccardo Giacconi think about the Multiverse hypothesis?

I can confirm that there isn't anything on the net. Moreover, Giacconni has written two books, one on X-Ray astronomy, first published in 1974 and although he mentions the cosmic X-Ray background ...
Mozibur Ullah's user avatar
1 vote

Why is it that so many early astronomers and cosmologists wanted to believe in a static/infinite/eternal Universe?

Personally I'm surprised that this is the case given that for hundreds of years Europe was Christian and the biblical Genesis quite matter of factly said that the universe was created. It's strange ...
Mozibur Ullah's user avatar

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