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Topic I-5
My very esteemed mother joyfully sings under nine planets*
5.1. Inventory of the Solar System
(Insert about two blank pages here)
5.2. Discovery of Uranus, Neptune and Pluto
* The title phrase is a mnemonic,
a method for remembering. It reminds us of the names of the planets, in order
of increasing orbit size. A German one: "Mein Vater erklaert mir jeden Sonntag
unsere neun Planeten"
References:
- Explorations: 7.1;
Overview from TNP; History from TNP
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