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The Bubble Nebula (NGC 7635) is a stunning, 7-light-year-wide bubble formed by a massive star 7,100 light-years away in Cassiopeia. The star’s winds blow gas at over 6.4 million km/h, creating this cosmic shape. The nebula's bright colors are from oxygen, hydrogen, and nitrogen gases. Discovered in 1787, it's one of the most fascinating objects in space.

Credit: NASA, ESA, Hubble Heritage Team
#space #universe #nasa #astro #astrophysics #physics #science