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Almost all the greatest discoveries in astronomy have resulted from what we have elsewhere termed Residual Phenomena, of a qualitative or numerical kind, of such portions of the numerical or quantitative results of observation as remain outstanding and unaccounted for, after subducting and allowing for all that would result from the strict application of known principles.
John Herschel
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Interpretation

What this quote means

Significant discoveries in astronomy often arise from unexplained observations and data that defy current understanding.

John Herschel emphasizes that many groundbreaking discoveries in astronomy come from phenomena that don't fit established theories or principles. These 'residual phenomena' challenge scientists to reconsider and expand their understanding of the universe, highlighting the importance of curiosity and openness to new ideas in the scientific process.

Themes

DiscoveriesAstronomyObservationsScienceCuriosity

In practice

Example use cases

In a classroom discussion on scientific inquiry, this quote can illustrate the role of unexplained phenomena in advancement.

More from John Herschel

...Nature builds up her refined and invisible architecture, with a delicacy eluding our conception, yet with a symmetry and beauty which we are never weary of admiring.
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Every student who enters upon a scientific pursuit, especially if at a somewhat advanced period of life, will find not only that he has much to learn, but much also to unlearn.
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To the natural philosopher, there is no natural object unimportant or trifling. From the least of Nature's works he may learn the greatest lessons.
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