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--- courses:ast100:2.1 [2026/02/23 23:53] – asad
+++ courses:ast100:2.1 [2026/02/23 23:53] (current) – asad
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 {{https://apod.nasa.gov/apod/image/1608/ganab_mosaic1640x600.jpg?nolink}}
-From our internal vantage point on Earth, peering into the plane of the Galactic disk reveals a hazy, irregular band of light stretching across the entire sky from horizon to horizon, formed by the merged light of countless stars mixed with obscuring dark lanes of interstellar dust. When viewed from a dark, moonless location, the appearance of this glowing band changes dramatically with the seasons as Earth orbits the Sun. In the summer, the Milky Way stretches brilliantly from Perseus in the northern horizon through Cygnus overhead, thickening toward the galactic center in Sagittarius and Scorpius in the south. By contrast, during the springtime, the Milky Way lies level with the horizon, leaving the overhead night sky largely free of its glowing band and allowing us to look unhindered out of the galactic plane toward deep, intergalactic space.
+From our internal vantage point on Earth, peering into the plane of the Galactic disk reveals a hazy, irregular band of light stretching across the entire sky from horizon to horizon (as seen above [[https://apod.nasa.gov/apod/ap160826.html|from Namibia]]), formed by the merged light of countless stars mixed with obscuring dark lanes of interstellar dust. When viewed from a dark, moonless location, the appearance of this glowing band changes dramatically with the seasons as Earth orbits the Sun. In the summer, the Milky Way stretches brilliantly from Perseus in the northern horizon through Cygnus overhead, thickening toward the galactic center in Sagittarius and Scorpius in the south. By contrast, during the springtime, the Milky Way lies level with the horizon, leaving the overhead night sky largely free of its glowing band and allowing us to look unhindered out of the galactic plane toward deep, intergalactic space.