Science Enhanced Scope & Sequence Grade 6

Pluto is smaller than our moon and is the only dwarf planet that has never been visited by one of our spacecraft or probes. Pluto has an unusually elliptical orbit. At its closest, it is about 4.4 billion kilometers (2.7 billion miles) from the sun, but it travels as far as 7.5 billion kilometers (4.7 billion miles) from the sun. ................
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