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Solar System quiz

Every question below is derived from a reviewed claim about solar system, with a real explanation shown once you submit.

ExplorerQuestion 1 of 4

The Sun contains more than 99% of all the mass in the Solar System.

ExplorerQuestion 2 of 4

Which planet is closest to the Sun?

InvestigatorQuestion 3 of 4

Planets orbit the Sun in perfect circles, with the Sun exactly at the centre.

ScientistQuestion 4 of 4

Kepler's third law states a planet's orbital period squared (T²) is proportional to its orbital distance cubed (a³). Earth orbits at 1 AU with a period of 1 year. What is the orbital period T (in years, to the nearest whole number) of a hypothetical planet orbiting at 4 AU?