One of the discoveries that led to the modern view of the solar system was that the orbits of the planets are not circular but ___________ . A) spherical B) elliptical C) sinusoidal D) irregular

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The orbits of the planets are not circular but elliptical, meaning that they are more like elongated ovals than perfect circles. This was a major discovery made by Johannes Kepler in the 17th century, and it helped to overturn the ancient idea that the planets moved in perfect circles around the Earth.

One of the Discoveries That Led to the Modern View