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Key Facts In This Video
Currently, a planet is defined as a body that orbits the sun, has enough mass to be spherical, and has an orbital path all to itself. 00:27
In 2015, astronomer Jean-Luc Margot proposed a new definition for planets that would encompass exoplanets found outside the solar system. 01:09
V774104 is the farthest object ever detected in our solar system, and is thought to be a dwarf planet. 02:12