Stars 101 | National Geographic

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Countless stars dot the night sky. Learn how these celestial objects form, how they are classified によって brightness and temperature, and what happens when they die.

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宇宙

science

cosmos

astronomy

solar

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Deep 宇宙

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Source: HubbleSite-Wallpapers

surface of mars

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Source: nasa

宇宙 Colors（色）

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Outer 宇宙 Clothes

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Source: tumblr

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宇宙 Art 壁紙 (Sci-Fi)

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