n. master disc
misc. charger plate
一条线索来自于主盘内恒星的金属丰度。
One clue comes from the metallicity of the disc's constituent stars.
银河系120000光年直径的主盘使它的其余部分相形见绌。
Spanning 120, 000 light years, our galaxy's disc outshines the rest of the Milky Way.
主盘包含着太阳及星系里其他大部分的恒星，当然还有美丽的旋臂。
The disc harbours the Sun and most of the galaxy's other stars, as well as the beautiful spiral arms.
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