Questions tagged [cosmology]
The cosmology tag has no usage guidance.
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Did pre-Galilean astronomy inspire Mach's principle?
Was Mach, in his formulation of "Mach's principle," influenced by pre-Galilean astronomy, such as that of Aristotle in On the Heavens, where heavenly bodies influence terrestrial ones?
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What is the ancient cosmic canon of proportion and its role in the history of science?
Who had direct inside knowledge of the canon through the alleged secret oral tradition? Some possible examples that have been alluded to include Pythagoras, Plato, Euclid, Copernicus, Galileo, Kepler, ...
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Thomas Kuhn and the Relationship between Astronomy and Cosmology
In The Copernican Revolution, Thomas Kuhn states that "...only the Western civilizations which descend from Hellenic Greece have paid much attention to the appearance of the heavens in arriving at [...
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Did Paul Dirac believe in multiple universes?
Prominent physicist Paul Dirac proposed a hypothesis that said that constants and laws of physics would evolve with time into different constants and laws of nature.
This hypothesis was used by ...
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Did Werner Heisenberg ever agree or propose the existence of some kind of multiverse?
I was watching a video (https://www.youtube.com/watch?v=muJYTeQlvC4) where the director of a videogame company speaks about one of its most successful games. This game is set in a floating city which ...
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Did Wheeler ever propose the existence of a multiverse containing parallel simultaneous universes?
It is known that the physicist John Archibald Wheeler proposed the existence of a multiverse in the form of a set of cycles of Big Bangs and Big Crunches (Cyclic/Oscillatory Multiverse Model).
But I ...
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107 views
Are Wheeler's It from Bit/Participatory Universe and the Multiverse related?
Could I ask you for the relation between Wheeler's ideas and the multiverse? Do you know if these are related?
I ask you this because I found this very interesting article written by Kip Thorne with ...
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What equation is Stephen Hawking most noted for?
I am trying to equate the famous Stephen Hawking to some of our other famous scientists and noted that the vast majority have an associated equation with their name. As for example Einstein was the ...
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198 views
Was an expanding universe proposed before Edwin Hubble's observations?
General relativity (1915), as I've heard it explained, describes a universe that is either shrinking or expanding. By adding a cosmological constant it can describe a universe in eternal steady state, ...
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267 views
When did the estimates of planetary distances made between Ptolemy and Copernicus produce the pattern suggesting heliocentrism?
Two patterns in the structure of the Ptolemaic model make the transformation of coordinates to the Copernican model seem "natural" to modern eyes:
the alignment of the radii of the (second) ...
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331 views
Nowadays I see a distinct “line” dividing people working in Mathematics and the Physical Sciences. Why?
The direction in which leading research is heading in these subjects (Math, Physics) is very much different and don't seem to be in tandem. Is this something that developed in more recent times? This ...
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337 views
Who discovered that the radius of the observable Universe is 46 billion ly?
I know that before the beginning of the 20th century it was thought that the Milky Way galaxy was the whole universe. Then there was the discovery of galaxy redshift, and the size of the Universe was ...
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Who introduced the notion of comoving distance in cosmology?
According to Wikipedia:
Comoving distance factors out the expansion of the universe, giving a distance that does not change in time due to the expansion of space (though this may change due to ...
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Did breaking of discrete symmetries play a role in the development of steady-state cosmology?
If you look at the original pair of 1948 papers[Bondi 1948,Hoyle 1948] that proposed the steady-state model, it's clear that they knew they were throwing out a lot of cherished principles of physics. ...
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162 views
What is the origin of the term recombination?
During the introductory lecture to a cosmology course I'm currently taking, there was a brief discussion of some of the "highlights" of the Big Bang model. One of these is, of course, recombination. ...
