This planet appears to be only marginally agricultural land, at least here.

For one thing, the planet appears to change with the expectations of the explorers.

We are not quite sure but the fourth planet appears to be main world of this solar system.

The planet had once more appeared on the screen.

The two known planets appear to have a 2:1 resonance with one another.

The 3rd planet appeared to be inhabited and was being defended.

The planet appeared, noticeably bigger than it had been before.

Over a period of few days the planet appears to consume the Moon.

The planet does not appear to meet conditions presumed necessary to support life.

The planet appears in several other books, as well.