Planet Nine

Summary

Planet Nine is a hypothetical planet^[1]. It draws 2,880 Wikipedia views per month (hypothetical_planet category, ranking #1 of 8).^[2]

Key Facts

• Planet Nine is credited with the discovery of Konstantin Batygin^[3].
• Planet Nine is credited with the discovery of Michael E. Brown^[4].
• Planet Nine's instance of is recorded as hypothetical planet^[5].
• Planet Nine's instance of is recorded as planet beyond Neptune^[6].
• Q19108 is named after Planet Nine^[7].
• Planet Nine is part of outer Solar System^[8].
• Planet Nine's Commons category is recorded as Planet Nine^[9].
• Planet Nine's parent astronomical body is recorded as Sun^[10].
• Planet Nine's time of discovery or invention is recorded as January 20, 2016^[11].
• Planet Nine's orbital eccentricity is recorded as {'amount': '+0.6'}^[12].
• Planet Nine's series ordinal is recorded as 9^[13].
• Planet Nine's different from is recorded as Planet X^[14].
• Planet Nine's different from is recorded as Plan 9 from Outer Space^[15].
• Planet Nine's mass is recorded as {'unit': 'Q681996', 'amount': '+10'}^[16].
• Planet Nine's orbital period is recorded as {'unit': 'Q577', 'amount': '+20000'}^[17].

Body

Definition and Type

Recorded instance of include hypothetical planet^[5] and planet beyond Neptune^[6].

Origins

Q19108 is named after Planet Nine^[7].

Use and Application

Planet Nine is part of outer Solar System^[8].

Why It Matters

Planet Nine draws 2,880 Wikipedia views per month (hypothetical_planet category, ranking #1 of 8).^[2] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.^[18] It is known by 17 alternative names across languages and contexts.^[19]