Is Pluto or Neptune farther from the sun now How do we know?

Neptune is currently farther from the Sun than Pluto. While both planets have elliptical orbits, Neptune's average distance from the Sun is about 30 astronomical units (AU), while Pluto's average distance is about 39 AU. However, Pluto's orbit is highly elliptical, which means that there are periods when it comes closer to the Sun than Neptune. Astronomers calculate these distances using precise measurements of the planets' positions in relation to the Sun.