SOLAR SYSTEM

Detailed explanation-1: -One day on Neptune takes about 16 hours (the time it takes for Neptune to rotate or spin once). And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years (60, 190 Earth days). Sometimes Neptune is even farther from the Sun than dwarf planet Pluto .

Detailed explanation-2: -So, Venus has the longest day of any planet in our solar system. It completes one rotation every 243 Earth days.

Detailed explanation-3: -Short Day, Long Year Neptune takes about 16 hours to rotate once (a Neptunian day), and about 165 Earth years to orbit the sun (a Neptunian year).

Detailed explanation-4: -As the eight and farthest planet from the Sun, Neptune has an extremely wide orbit and a comparatively slow orbital velocity. As a result, a year on Neptune is very long, lasting the equivalent of almost 165 Earth years.