Neptune

September 1846
The home of possibly an ocean, but likely not
A place where a day is only 16 hours but a trip takes 165 years
if headed in a ellipse
Where diamond rain may be an occurrence
Icy crystals in a frozen tundra
As strong winds would blow it around, that is
Until those winds suddenly up and disappeared
With little to no explanation as to why
What is the furthest planet from the sun