Context: From its discovery in 1846 until the subsequent discovery of Pluto in 1930, Neptune was the farthest known planet. When Pluto was discovered it was considered a planet, and Neptune thus became the penultimate known planet, except for a 20-year period between 1979 and 1999 when Pluto's elliptical orbit brought it closer to the Sun than Neptune. The discovery of the Kuiper belt in 1992 led many astronomers to debate whether Pluto should be considered a planet or as part of the Kuiper belt. In 2006, the International Astronomical Union defined the word "planet" for the first time, reclassifying Pluto as a "dwarf planet" and making Neptune once again the outermost known planet in the Solar System.

Question: What was Neptune before Pluto was discovered? 
Answer: farthest known planet

Question: What period was Pluto closer to the sun than Neptune? 
Answer: between 1979 and 1999

Question: What discovery made astronomer's debate Pluto's status as a planet? 
Answer: the Kuiper belt

Question: What year did the International Astronomical Union define the word planet? 
Answer: 2006

Question: Now that Pluto isn't a planet, what is Neptune known for in our solar system? 
Answer: the outermost known planet

Question: What was the furthest know planet until 1846?
Answer: Unanswerable

Question: What planet was discovered before neptune?
Answer: Unanswerable

Question: What body was not considered a planet when it was discovered?
Answer: Unanswerable

Question: What was Jupiter before Pluto was discovered?
Answer: Unanswerable

Question:  What period was Jupiter closer to the sun than Neptune?
Answer: Unanswerable

Question: What discovery made astronomer's debate Neptune's status as a planet?
Answer: Unanswerable

Question: What year did the International Astronomical Union define the word star?
Answer: Unanswerable

Question: Now that Pluto isn't a planet, what is Uranus known for in our solar system?
Answer: Unanswerable