NSEA · Elementary Astronomy

Solar System

Sun, planets, moons, asteroids, comets, meteors and dwarf planets — basic structure and properties.

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  • Q1 · Solar System · EASY

    The synodic period of Mars is approximately 780 days. Given Earth's orbital period is 365 days, what is the sidereal period of Mars in years?

  • Q2 · Solar System · MEDIUM

    A planet has a semi-major axis of 5.2 AU. According to Kepler's Third Law, what is its approximate orbital period?

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