Watch the stroke order, then trace it yourself.
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seven luminaries (the sun, moon, and five visible planets)
heavenly bodies; luminaries
obsidian rock
obsidian
This piece of obsidian shines with a dark gleam in the sunlight.
Ancient people called the sun, moon, and five visible planets the seven luminaries.
Obsidian rock is a kind of dark volcanic rock.
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Characters pronounced "yao".
Characters with radical "日".