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| Smallpox vaccine |
This drives me insane.
Thinking out loud....
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| Smallpox vaccine |
But astronomy opened so many more doors than that. It's no exaggeration to say that the human race itself was introduced to science via astronomy. Many, many thousands of years before we could view or measure much of anything else scientifically, we could do it to the heavens. The sky is enormous (many of us forget, since we usually focus on what's right in front of us), and mysterious. Few things are so universally spread out through ancient myths across the globe as the stars, sun, and moon are. They were gods, spirits, demons, heroes, life-givers. They were omens, portents, signs, symbols. They were patterns, stories, histories. And they were predictable. These incredibly important things that everyone could see, things that supposedly could determine our future, or give us a clue as to the workings of the gods, could be understood. From these superstitions came the very first systematic scientific observations and recordings. Those ancient astronomers/astrologers (for at the time, there was little distinction) viewed and charted when the sun rose and set, how it rose higher in the sky during summer and lower in winter, the phases of the moon and when it rose and set, how they could interact to cause solar and lunar eclipses, the positions of the stars relative to the sun throughout the year, what constellations were visible when, the movements of each of the planets, and so many, many other things that could be seen simply by looking up and paying attention. So for millennia, these observations were recorded, and all the while we wondered what, exactly these lights in the sky actually were. How far away are they? What are they made of? Why do they move as they do? How do they relate to the Earth? Do they affect us?
Four hundred years ago, in 1609, an Italian scientist named Galileo Galilei made significant improvements to a new Dutch invention for seeing across long distances that would later be called the telescope, and turned it skyward. The observations he made through those simple, early telescopes and the theories proposed based on those observations are easily among the most important in the history of science, and inarguably helped kick-start the entire field of modern science. Even more than that: he forever changed how the entire human race views itself, and its place in the universe. It had been assumed that all of the heavenly bodies were perfect spheres manufactured by God hisownself, but Galileo saw rough mountains on the Moon. Even the supposedly all-perfect Sun turned out, under Galileo's watchful eye, to have the occasional spot on it. Everyone knew as well that everything in the sky rotated directly around the Earth, but Galileo saw four moons going around Jupiter. Ah, but the major things, like the planets themselves, they still went around the Earth! But Galileo saw that Venus had full phases, new, crescent, half, gibbous, full, and back again, while never going very far from the Sun. The Morning Star, the brightest object in the sky after the Sun and Moon, was orbiting the Sun, not us. We were not the center of the universe. This was, to put it lightly, a humbling discovery, and affected every single aspect of our lives, far beyond science.
And now, four hundred years later, a dozen human beings have set foot on the Moon. We have sent probes to land on and orbit around other planets, to leave the solar system itself and report back to us. We now know that there are hundreds of billions of galaxies, untold numbers of stars (septillions?), black holes, quasars, pulsars, nebulae, and more. Over just the last decade and a half, we have discovered hundreds of planets going around other stars, and it's only a matter of time before our observations are keen enough to find ones that are Earth-like. We are learning more and more every single day about the entirety of the universe, everything that is, about the nearly 14-billion-year history that brought us here and about what might happen next. And when I go out amidst the glare of city lights and look through my cheap, plastic telescope to see shadows on the Moon, and the Galilean satellites of Jupiter, and the rings of Saturn, to see them, to really see them, not as a picture, not as a video or computer animation, but to really SEE them, right there before my eyes just as Galileo did, I feel a sense of awe at being part of such an unimaginably vast cosmos, and feel connected to all those who went before me, looking up and wondering and thinking, turning the world around and upside-down, even back to the dawn of civilization, and forward to all those who will come after, and look up at the stars, and wonder.