https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Sun, 21 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe.en https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe.en From the discovery of an expanding universe to the decisive evidence of the cosmic microwave background, we trace the 13.8 billion year story of how everything began. Dark matter, dark energy, and the possible fates of the cosmos are all part of the journey. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) cosmologybig-bangastronomyuniversephysics https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe.ja https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe.ja 膨張する宇宙の発見から、宇宙背景放射という決定的な証拠まで、138億年の宇宙の始まりをやさしく読み解きます。暗黒物質と暗黒エネルギー、そして宇宙の未来までいっしょに見つめます。 Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) cosmologybig-bangastronomyuniversephysics https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe https://www.youngju.dev/blog/culture/2026-06-21-big-bang-origin-of-universe 팽창하는 우주의 발견부터 우주배경복사라는 결정적 증거까지, 138억 년 우주의 시작을 쉽게 풀어봅니다. 암흑물질과 암흑에너지, 우주의 미래도 함께 들여다봅니다. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) cosmologybig-bangastronomyuniversephysics https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained.en https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained.en A black hole is a trap in spacetime from which even light cannot escape. How black holes are born from the death of stars, what event horizons and singularities are, spaghettification and Hawking radiation, and the first photograph of a black hole that humanity finally captured — this essay unpacks difficult physics through simple analogies. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) black-holeastrophysicsspacesciencerelativitycosmology https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained.ja https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained.ja ブラックホールは、光さえ脱出できない時空の罠です。星の死からどのようにブラックホールが生まれるのか、事象の地平面と特異点とは何か、スパゲッティ化とホーキング放射、そして人類がついに撮影したブラックホールの初の写真まで、難しい物理をやさしいたとえで解きほぐします。 Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) black-holeastrophysicsspacesciencerelativitycosmology https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained https://www.youngju.dev/blog/culture/2026-06-21-black-holes-explained 블랙홀은 빛조차 탈출하지 못하는 시공간의 함정입니다. 별의 죽음에서 어떻게 블랙홀이 태어나는지, 사건의 지평선과 특이점은 무엇인지, 스파게티화와 호킹 복사, 그리고 인류가 마침내 찍어낸 블랙홀의 첫 사진까지, 어려운 물리를 쉬운 비유로 풀어 봅니다. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) black-holeastrophysicsspacesciencerelativitycosmology https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time.en https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time.en Why does a broken cup never reassemble on its own? An accessible tour of the second law of thermodynamics and entropy in the language of disorder and probability, the reason time flows in only one direction, Maxwell demon, life and entropy, and the distant fate of the universe. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) entropythermodynamicsphysicstimesciencecosmology https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time.ja https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time.ja 割れたコップはなぜひとりでに元に戻らないのか。熱力学第二法則とエントロピーを無秩序と確率の言葉でほどき、時間が一方向にだけ流れるわけ、マクスウェルの悪魔、生命とエントロピー、そして宇宙の遠い運命までを日常の比喩で案内する。 Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) entropythermodynamicsphysicstimesciencecosmology https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time https://www.youngju.dev/blog/culture/2026-06-21-entropy-arrow-of-time 깨진 컵은 왜 저절로 붙지 않을까. 열역학 제2법칙과 엔트로피를 무질서와 확률의 언어로 풀어내고, 시간이 한 방향으로만 흐르는 까닭, 맥스웰의 악마, 생명과 엔트로피, 그리고 우주의 먼 운명까지 일상의 비유로 안내한다. Sun, 21 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) entropythermodynamicsphysicstimesciencecosmology