Neptune takes 164 Earth years to orbit around the Sun.
As the first direct observation of the blue-green gas giant was made on Sept. 23, 1846, Neptune will arrive back in approximately the same spot as where it was first spotted on July 12, 2011.
Neptune takes 164 Earth years to orbit around the Sun.
As the first direct observation of the blue-green gas giant was made on Sept. 23, 1846, Neptune will arrive back in approximately the same spot as where it was first spotted on July 12, 2011.