Answer :
Kepler's theory revisions to the theory of planet formation have astronomers had to make as a result of the discovery of exoplanets
What is Kepler's theory?
They explain how planets orbit the Sun in elliptical fashion, how they cover the same amount of space in a given amount of time regardless of where they are in their orbits, and how their orbital periods are proportional to the size of their orbits.
What are exoplanets?
Any planet outside the solar system is considered an exoplanet. Rogue planets are free-floating exoplanets that orbit the galactic center without being bound to any star, unlike the majority of exoplanets that orbit other stars.
The planets may move in the protoplanetary disk due to drag or friction caused by gravity. In order to model or detect the presence of a planet using the radial velocity technique, an entire orbit is necessary.
Therefore, the closest planets have brief periods, according to Kepler's laws.
Learn more about Kepler's theory from the given link.
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