“Cosmologists have plenty of ego — how can a person not be ego-driven when it's your job to deduce what brought the universe into existence? But without data, their explanations were just tall tales. In this modern era of cosmology, each new observation, each morsel of data wields a two-edged sword: it enables cosmology to thrive on the kind of foundation that so much of the rest of science enjoys, but it also constrains theories that people thought up when there wasn't enough data to say whether they were wrong or not. No science achieves maturity without it.Let there be cosmology.”

— Neil deGrasse Tyson

Let There Be Light, Natural History Magazine, October 2003, 2010-12-07 http://www.haydenplanetarium.org/tyson/read/2003/10/01/let-there-be-light, <br class="br">2000s

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American astrophysicist and science communicator 1958

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“There is no direct observational evidence for the curvature [of space], the only directly observed data being the mean density and the expansion, which latter proves that the actual universe corresponds to the non-statical case. It is therefore clear that from the direct data of observation we can derive neither the sign nor that value of the curvature, and the question arises whether it is possible to represent the observed facts without introducing the curvature at all. Historically the term containing the 'cosmological constant λ' was introduced into the field equations in order to enable us to account theoretically for the existence of a finite mean density in a static universe. It now appears that in the dynamical case this end can be reached without the introduction of λ.”

Willem de Sitter (1872–1934) Dutch cosmologist

Joint memoir with Einstein (1932) as quoted by Gerald James Whitrow, The Structure of the Universe: An Introduction to Cosmology (1949)

“Science books go out of date. We throw the old one away when a newer one comes out, when we have new theories. But we don't throw away our old data; we merely interpret them differently. New theories try to account for old data (and new data) in new ways.”

Guy Consolmagno (1952) American Jesuit, Catholic Priest, research astronomer and planetary scientist at the Vatican Observatory.

[Consolmagno, Guy, Mueller, Paul, https://www.google.com/books?id=lf5vDwAAQBAJ&pg=PA16, 9780804136952, Would You Baptize an Extraterrestrial?: And Other Questions from the Astronomers' In-Box at the Vatican Observatory, 16, 2014, Image]

“Data has no ego and makes an excellent copilot.”

Jay Samit (1961) American businessman

Source: Disrupt You! (2015), p.119

“The existence of exotic dark matter particles outside the standard model of particle physics constitutes a central hypothesis of the current standard model of cosmology (SMoC). Using a wide range of observational data I outline why this hypothesis cannot be correct for the real Universe.”

Pavel Kroupa (1963) Australian astrophysicist

[Pavel Kroupa, 2014, Lessons from the Local Group (and beyond) on dark matter, arXiv.org, http://arxiv.org/abs/1409.6302]

“It was early 1932, when Einstein and I both were at the California Institute of Technology in Pasedena, and we just decided to look for a simple relativistic model that agreed reasonably well with the known observational data, namely, the Hubble recession rate and the mean density of matter in the universe. So we took the space curvature to be zero and also the cosmological constant and the pressure term to be zero, and then it follows straightforwardly that the density is proportional to the square of the Hubble constant. It gives a value for the density that is high, but not impossibly high. That's about all there was to it. It was not an important paper, although Einstein apparently thought that it was. He was pleased to have a simple model with no cosmological constant. That's it.”

Willem de Sitter (1872–1934) Dutch cosmologist

As quoted by Helge Kragh, Masters of the Universe: Conversations with Cosmologists of the Past (2014)

“The fact must be expressed as data, but there is a problem in that the correct data is difficult to catch. So that I always say "When you see the data, doubt it!" "When you see the measurement instrument, doubt it!… For example, if the methods such as sampling, measurement, testing and chemical analysis methods were incorrect, data… to measure true characteristics and in an unavoidable case, using statistical sensory test and express them as data.”

Kaoru Ishikawa (1915–1989) Japanese business theorist

Kaoru Ishikawa in: Annual Quality Congress Transactions, (1981), p. 130

“Science doesn't stop when it comes up with a nice answer. It looks for more data. It comes up with new ideas. It's willing to admit it's wrong.”

Guy Consolmagno (1952) American Jesuit, Catholic Priest, research astronomer and planetary scientist at the Vatican Observatory.

[From MIT to Specola Vaticana: Guy Consolmagno at TEDxViadellaConcialiazione, April 24, 2013, TEDx Talks, YouTube, https://www.youtube.com/watch?v=kmU2gDbP_Tk] (quote at 6:38 of 17:52)

“When a manager asks for hard data, that's usually just his way of saying no.”

Ward Cunningham (1949) American computer programmer who developed the first wiki

Geek Noise (2004)

“When the theory performs well you also think, “Are there parallel results in naturally occurring field data?” You look for coherence across different data sets because theories are not specific to particular data sources. Such extensions are important because theories often make specific assumptions about information and institutions which can be controlled in the laboratory, but which may not accurately represent field data generating situations. Testing theories on the domain of their assumptions is sterile unless it is part of a research program concerned with extending the domain of applications of theory to field environments”

Vernon L. Smith (1927) American economist

Source: "Theory, experiment and economics," 1989, p. 151.

“If enough data points trouble the theory, the theory may be wrong. If the theory is basic, the paradigm may have to change.”

Kim Stanley Robinson book Green Mars

Source: Green Mars (1993), Chapter 8, “Social Engineering” (p. 410)

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