The Recently Dwarf Planet Eris Has an Orbital Period About

question 50

Multiple Choice

The recently dwarf planet Eris has an orbital period about the Sun, P, of 557 years. According to Kepler's 3ʳᵈ Law, what is the semi-major axis, a, of its orbit?

• A) 55.7 AU
• B) 38.4 AU
• C) 72.1 AU
• D) 67.7 AU

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