[조헌정의 ‘오늘의 성찰’] blue jewel

When you look down from Earth’s orbit, you see lakes, rivers, peninsulas… and quickly skim through vivid terrain changes such as snow-capped mountains, deserts, or rainforests. Every 90 minutes it passes through the morning and evening glow. Out of Earth’s orbit… without moving your head, you can see the South Pole, the North Pole, and each ocean one following another… As the Earth revolves around an invisible axis of rotation, you literally see the North and South Americas disappearing beyond, and to your surprise. Australia and Asia appeared in their place, and then the Americas appeared once more. Then we realize how much we don’t know regarding time…. What space and what time am I? and ask yourself Watch the sun set over the Americas and then rise once more over Australia. Looking back on ‘hometown’… I can’t find any barriers between race, religion, and ideology that divide this world. (Astronaut Eugene Cernan)

No tribal conflicts, national policies, or geographic divisions colored on maps are visible from space. Of course, science has also revealed that this blue gem revolves around a lifeless star located at the edge of an unfamiliar galaxy of countless stars in a universe of countless galaxies. All of our history and destiny took place under the atmospheres of intermediate planets in our solar system. Through space travel, we learned that Earth is the home of mankind. But Earth is more than just a home. A part of us, Earth, the third planet of the Sun in a barren solar system at the edge of our galaxy, is a blue body dotted with white dots in contrast to the pale moon, which looks like a living jewel.

What is life? It is a material process that appears and surfs on matter like a strange wave rushing in slowly. It’s a controlled artistic chaos, a stunningly complex series of chemical reactions that created the brains of mammals more than 80 million years ago, now write love letters in human form, and use computers to measure the temperature of matter at the time the universe was born. came to the calculation. Moreover, life seems to be trying to realize for the first time its unfamiliar but true place in the ever-evolving universe.

Life, a local phenomenon on the Earth’s surface, can in fact be understood only by considering the cosmic environment together. Shortly following the remnants of a supernova explosion 4.6 billion years ago condensed to form Earth, life arose from the stellar material. Life may end in just 100 million years when the Earth’s temperature control system finally collapses due to a decrease in atmospheric resources and an increase in heat from the sun. Or life may escape surrounded by ecosystems and in a safe haven, regarding 5 billion years later, as the hydrogen-fuelled Sun explodes into a red giant, evaporating the Earth’s seawater. / 『What is Life?』 Lynn Margulis, Dorian Sagan. Young Kim. Lisu. 2021.

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