The Milky Way’s True Size | Science for Sleep скачать в хорошем качестве

The Milky Way’s True Size | Science for Sleep

We live inside the Milky Way—so we never get to step outside and see the full shape. What looks like a pale band in the night sky is actually the inside view of a vast spiral city of stars. In this episode, we rebuild the Milky Way from clues: where the Sun sits, how the disk and halo are structured, what holds spiral arms together, what the black hole at the center is doing, and how we measured a galaxy we can’t photograph from the outside. Chapters: The Milky Way reveal: that “sky band” is our home seen from within Our address: the Sun’s place in the disk and near the spiral structure The core structure: disk, bulge, and the extended halo Spiral arms: why the pattern survives while stars keep moving The galactic center: Sagittarius A* and the crowded nuclear region Measuring the size: from parallax and Cepheids to Gaia’s star map What it’s made of: stars, gas, dust, and the hidden regions they block Dark matter halo: the invisible mass that sets the real scale Mapping the whole galaxy: radio, infrared, and all-sky surveys The future: star formation slowdown and the long road toward Andromeda If you enjoy science that’s easy to follow at night, subscribe for more. Image credit: NASA (publicly available media) #science #space #astronomy #milkyway #galaxy #cosmology #whatif #sleep