Q. What is 'Planet Nine', recently seen in news?
Answer:
A hypothetical planet in the outer region of our solar system
Notes: Astronomers have been searching for a hypothetical ninth planet, Planet Nine, in the outer solar system for nearly a decade. Proposed to explain anomalies in the orbits of distant trans-Neptunian objects, Planet Nine is estimated to be 5-10 times the mass of Earth with a highly elliptical orbit, ranging from 400 to 800 AU from the Sun. Experts believe we may soon find it.