The dwarf planet Eris has a moon called Dysomia, which is much smaller in mass than Eris. If Dysomia has an orbital period of 16 days and orbits Eris at a distance of 40,000 km, then what is the mass of Eris? A) 2 * 10¹³ kg B) 2 *10²² kg C) 2 * 10²⁸ kg D) 2 *10³² kg E) 2 * 10³⁵ kg

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Quizplus · Accepted Answer

Using Kepler's third law and the formula for gravitational force, the mass of Eris can be calculated as approximately 2.27 x 10^22 kg, which is closest to option B.

The Dwarf Planet Eris Has a Moon Called Dysomia, Which