No one knows what drives the weather changes on Neptune, but
the feeble sunlight out there may not be enough.
To eek out its lonely existence, this life form scavenges energy from
the feeble sunlight available to it at a depth of over 250 feet.
They cut back the rovers» workload sharply to match the little electricity that could be gleaned from
the feeble sunlight that filtered through the dim, dusty sky to the rovers» solar panels.
Under such
feeble sunlight its surface only reaches a high of -180 °C.