<P> Uranus orbits the Sun once every 84 years . Its average distance from the Sun is roughly 20 AU ( 3 billion km ; 2 billion mi ) . The difference between its minimum and maximum distance from the Sun is 1.8 AU , larger than that of any other planet , though not as large as that of dwarf planet Pluto . The intensity of sunlight varies inversely with the square of distance , and so on Uranus ( at about 20 times the distance from the Sun compared to Earth ) it is about 1 / 400 the intensity of light on Earth . Its orbital elements were first calculated in 1783 by Pierre - Simon Laplace . With time , discrepancies began to appear between the predicted and observed orbits , and in 1841 , John Couch Adams first proposed that the differences might be due to the gravitational tug of an unseen planet . In 1845 , Urbain Le Verrier began his own independent research into Uranus 's orbit . On 23 September 1846 , Johann Gottfried Galle located a new planet , later named Neptune , at nearly the position predicted by Le Verrier . </P>
<P> Uranus orbits the Sun once every 84 years . Its average distance from the Sun is roughly 20 AU ( 3 billion km ; 2 billion mi ) . The difference between its minimum and maximum distance from the Sun is 1.8 AU , larger than that of any other planet , though not as large as that of dwarf planet Pluto . The intensity of sunlight varies inversely with the square of distance , and so on Uranus ( at about 20 times the distance from the Sun compared to Earth ) it is about 1 / 400 the intensity of light on Earth . Its orbital elements were first calculated in 1783 by Pierre - Simon Laplace . With time , discrepancies began to appear between the predicted and observed orbits , and in 1841 , John Couch Adams first proposed that the differences might be due to the gravitational tug of an unseen planet . In 1845 , Urbain Le Verrier began his own independent research into Uranus 's orbit . On 23 September 1846 , Johann Gottfried Galle located a new planet , later named Neptune , at nearly the position predicted by Le Verrier . </P>
how many km is uranus away from the sun
how many km is uranus away from the sun
20 AU ( 3 billion km ; 2 billion mi )
20 AU ( 3 billion km ; 2 billion mi )