Tag Archives: Galileo Galilei

Galileo Galilei pictured in his early 40s c. 1600.

Return to Normalcy

Over the last week, I've been thinking about the standards we define to cast a model of normality, or in an older term normalcy. This week then, I try to answer the question of what even is normal? — Click here to support the Wednesday Blog: https://www.patreon.com/sthosdkane


Over the last week, I’ve been thinking about the standards we define to cast a model of normality, or in an older term normalcy. This week then, I try to answer the question of what even is normal?


One of the great moments of realization in my life to date was when it occurred to me that everything we know exists in our minds in relation to other things, that is to say that nothing exists in true isolation. The solar eclipse I wrote about last week was phenomenal because it stood in sharp contrast to what we usually perceive as the Sun’s warmth, and a brightness which both ensures the longevity of life and can fry anything that stares at it for too long. So too, we recognize the people around us often in contrast to ourselves. Everyone else is different in the ways they walk, the ways they talk, the ways they think and feel. We are our own control in the great experiment of living our lives, the Sun around which all the planets of our solar system orbit.

There is a great hubris in this realization, as a Jesuit ethics professor at Loyola said to my Mom’s class one day, in a story she often recounts, no one acts selflessly, there’s always a motive for the things we do. That motive seems to be in part driven by our desire to understand how different things work, how operations can function outside of the norm of our own preferences or how we would organize them. I might prefer to sort the books on my shelves by genre, subgenre, and then author; history would have its own shelf with the history of astronomy in its own quadrant of that shelf and Stillman Drake’s histories of Galileo set before David Wootton’s Galileo: Watcher of the Skies. Yet, at the same time I could choose to add another sublevel of organization where each author’s titles are displayed not alphabetically but by publication date. So, Stillman Drake’s Two New Sciences of 1974 would be placed before his 1978 book Galileo At Work.

This shelving example may seem minor, yet one can find greater divergence in book sorting than just these small changes here or there. My favorite London bookseller, Foyle’s on Charing Cross Road, was famous for many decades for the eccentricities of organizing the books on their shelves by genre, yet then not by author but by publisher. This way, all the black Penguin spines would be side-by-side, giving a uniform look to the shelves of that establishment. It is pleasant to go into Foyle’s today and see on the third floor all the volumes of Harvard’s Loeb Classical Library side-by-side with the Green Greek volumes contrasting with the Red Roman ones on the shelves below. Yet to have books organized by publisher when the average reader is more interested in searching for a particular author seems silly. Yet that was the norm in Foyle’s for a long time until the current ownership purchased the business.

Our normal is so remarkably defined by our lived world. In science fiction, bipedal aliens who have developed societies and civilizations are called humanoid, in a way which isn’t all that dissimilar from how the first generations of European explorers saw the native peoples of the Americas. André Thevet wrote in his Singularitez, the book which I’ve translated, that the best way he could understand the Tupinambá of Brazil was by comparing them to his own Gallic ancestors at the time of Caesar’s conquest of Gaul in the first century BCE. Even then, an older and far more ancient normal of a time when he perceived that his own people lived beyond civilization was needed to make sense of the Tupinambá. The norms of Thevet’s time, declarations of the savagery of those who he saw as less civilized for one, are today abnormal. Thus, our sense of normal changes with each generation. For all his faults and foibles, Thomas Jefferson got that right, in a September 1789 letter to James Madison, Jefferson argued that “by the law of nature, one generation is to another as one independent nation to another.” Thus, the norms of one generation will both build upon and reject those of their predecessors.

At the same time that we continue to refer to the aliens of fiction in contrast to ourselves, we have also developed systems of understanding the regulations of nature that build upon the natural world of our own planet. The Celsius scale of measuring temperatures is based on the freezing point of water. At the same time, the Fahrenheit scale which we still use in the United States was originally defined by its degrees, with 180 degrees separating the boiling (212ºF) and freezing points (32ºF) of water. the source of all life on our own planet and a necessary piece of the puzzle of finding life on other planets. I stress here that that water-based life would be Earthlike in nature, as it shares this same common trait as our own. So, again we’re seeing the possibility of other life in our own image. Celsius and Fahrenheit then are less practical as scales of measurement beyond the perceived normalcy of our own home planet. It would be akin to comparing the richness of the soils of Mars to those of Illinois or Kansas by taking a jar full of prairie dirt on a voyage to the Red Planet. To avoid this terrestrial bias in our measurements, scientists have worked to create a temperature scale which is divorced from our normalcy, the most famous of these is the Kelvin scale, devised by Lord Kelvin (1824–1907), a longtime Professor of Natural Philosophy at the University of Glasgow in Scotland. Kelvin’s scale is defined by measuring absolute 0. Today, the Celsius and Fahrenheit scales are both officially defined in the International System of Units by their relations to the Kelvin scale, while still calculating the freezing point of water as 0ºC or 32ºF.

In this sense, the only comparison that can be made between these scales comes through our knowledge of mathematics. Galileo wrote in his 1623 book Il Saggiatore, often translated as The Assayer, that nature, in Stillman Drake’s translation, “cannot be understood unless one first learns to comprehend the language and interpret the characters in which it is written. It is written in the language of mathematics, and its characters are triangles, circles, and other geometrical figures.”[1] I love how the question of interplanetary communication in science fiction between humanity and our visitors is often answered mathematically, like the prime numbers running through Carl Sagan’s Contact which tell the radio astronomers listening in that someone is really trying to talk to them from a distant solar system. There one aspect of our own normalcy can act as a bridge to another world’s normalcy, evoking a vision of a cosmic normal which explains the nature of things in a way that would have made Lucretius take note.

I regret that my own mathematical education is rather limited, though now in my 30s I feel less frustration toward the subject than I did in my teens. Around the time of the beginning of the pandemic, when I was flying between Kansas City and Binghamton and would run out of issues of the National Geographic and Smithsonian magazines to read, I would sit quietly and try to think through math problems in my mind. Often these would be questions of conversions from our U.S. standard units into their metric equivalents, equivalents which I might add are used to define those U.S. standard units. I’ve long tried to adopt the metric system myself, figuring it simply made more sense, and my own normal for thinking about units of measurement tends to be more metric than imperial. That is, I have an easier time imagining a centimeter than I do an inch. I was taught both systems in school, and perhaps the decimal ease of the metric system was better suited to me than the fractional conversions of U.S. Standard Units, also called Imperial Units for their erstwhile usage throughout the British Empire.

In his campaign for the Presidency in 1920, Republican Warren G. Harding used the slogan “Return to Normalcy.” Then and ever since, commentators have questioned what exactly Mr. Harding meant by normalcy. I think he meant he wanted to return this country to what life had been like before World War I, which we entered fashionably late. I think he also meant a return to a sort of societal values which were more familiar to the turn of the twentieth century, values perhaps better suited to the Gilded Age of the decades following the Civil War which in some respects were still present among his elite supporters. I remember laughing with the rest of the lecture hall at the presentation of this campaign slogan, what a silly idea it was to promise to return to an abstract concept that’s not easily definable. Yet, there is something comforting about the idea of there being a normal. I’ve looked for these normalcies in the world and seen some glimpses of it here or there. Perhaps by searching for what we perceive as normal, we are searching within our world for things we have crafted in our own image. We seek to carry on what we have long perceived as works of creation, the better to leave our own legacy for Jefferson’s future generations to use as foundations for their own normal.


[1] Galileo Galilei, Discoveries and Opinions of Galileo, (Garden City, NY: Doubleday Anchor Books, 1957), 238.



Galileo, Galileo

Photo by Juan Martin Lopez on Pexels.com

If there are any reasons why I find myself drawn to Galileo, this distant Italian astronomer who lived 400 years ago it’s that we have two things in common: we’re both stubborn and occasionally grumpy. I’ve known the basics of Galileo’s story for most of my life; he was an astronomer who was born in Florence and worked in the Venetian Republic at the University of Padua who was one of the first to use a telescope to look out into the night sky, making him the first to observe the Galilean moons of Jupiter, collectively named today for the man himself. His support of Copernicus’s heliocentric model––that the Earth revolves around the Sun––contributed to his falling out with the Papacy and his eventual arrest and trial by the Roman Inquisition who put him under house arrest for the last few decades of his life.

Of course, the real story isn’t quite that simple, after all many of his opponents agreed in principle with what he was arguing, they just didn’t like how he argued it. Still, Galileo’s contributions to science and to human knowledge of our cosmos overall are undeniable. In the last few weeks, I’ve thought about Galileo quite a bit as Jupiter has come the closest to Earth in its orbit for the first time in decades. I got a good look at Jupiter both through a telescope and with my own eyes on Friday night a few weeks ago up at the Kopernik Observatory and even was able to take a better-quality picture of it than I’ve gotten before with my phone.

Jupiter as seen with an iPhone camera on the 4th Friday in September at the Kopernik Observatory in Vestal, NY. Photo: Seán Kane.

I see in Galileo an inspiration of sorts because of the things he did. He was able to prove that the Moon wasn’t perfectly spherical by observing the shadows of the crater walls (what he called mountains) on the lunar surface. Using those shadows, the effects of the lunar geography, Galileo could prove the existence of something he otherwise wouldn’t have been able to see. It’s like how when it rains the best way to actually see the raindrops falling on your head is to look at them with a dark background like a tree or a darker-colored house. Otherwise, the water droplets will blend in with the ambient colors surrounding them. Likewise, we can see the Moon and the planets because it’s the light of our Sun shining on them that is reaching us here. The Moon doesn’t light itself up, nope, nor does the Earth, rather it’s the Sun that naturally does the job.

Here lies an interesting development in this story: the Sun lights up the Earth during the day, but the Earth is now still lit up at night. Only a few generations ago our ancestors figured out how to use electricity to light up our lives and turn the darkness of night into something new entirely. As long as I can remember I’ve been fascinated by this idea, that even at night some places are well lit. I wonder today if our cities might even be built with night in mind, if there’s more artistry in the architecture when the buildings are lit up by electricity rather than by the Sun’s rays? Certainly, we have more control over how our buildings are lit in this context rather than during the daytime. One of my favorite ways to experience a museum is after dark when all the lighting being done has been devised by an exhibit designer trying to control all aspects of how the exhibit is lit through their own lighting patterns. The British Museum does a really awe-inspiring job with lighting the Parthenon Marbles in such a way that their great shadows climb up the walls of their room making them seem even larger-than-life than they already are.

Still, in Galileo’s day before electric lighting they could see more of the night sky. It’s a sign of the world that we live in that it wasn’t until my 28th year that I actually saw the band of the Milky Way up in the night sky. Even in my youth growing up on the farm on the western edge of the Kansas City metro I never saw it. I think seeing the night sky in all its splendor gives us a chance to reconnect with our past before our industrialized modern world, to reconnect with the lights that illuminated our ancestor’s nights and memories. I’ve talked before here about how profound it seemed to me to be able to see light from Vega that had left that star when I was a child, well the same is true for seeing the same moons of Jupiter that Galileo first saw in 1610 from his telescope in Padua.

As winter approaches here in the Northern Hemisphere we’ll get to see a lot more of the night sky. The days are already here when the sun is setting in Binghamton during dinner time. The fall chill is in the air. It amazes me that October is already upon us, after all it feels like we were just in August; but then again, I probably say the same thing a few times every year. When I was little and first learning the names of the months in school, I remember being given worksheets that included pictures for each month to personify that time the better to remember it by. March was shown as a lion, April as a storm cloud, and May as a flower. In the Fall, September was a tree having reached its fullest bloom after the summer heat, and October was a collection of fallen leaves surrounding a Jack-o-Lantern.

I wonder how Galileo would’ve personified those months, or if he even would’ve thought of doing that? The month of my birth, December, is often associated with the beginning of the Holidays, in my tradition of Christmas specifically. Yet it’s also often thought of as the beginning of winter even though the worst of the winter cold and snows don’t come until January. Yet the seasons here in North America are different than those in Europe; in fact, I found that our months and seasons make more sense in Britain than they do in America where the weather changes at a more expected time than its fluctuations here in America allow. In my Midwestern home I’ve experienced Halloweens in the snow and Halloweens in summer conditions. In my year living in London though, admittedly now a heat island, when it got cold in October it stayed cold until March.

How different then is our world from Galileo’s? How much has our industry and development changed the world we live in? And how different will the world be at the end of this century from the world I knew as a child at the end of the last century? These are all questions I’m going to leave you with today.