The planet could remain at an obliquity of 60 to 90 for periods as long as 10 million years.

We have been careful to ensure that our planet has remained in balance for thousands of years.

Since that time, both planets had remained in a state of armed truce.

The inner planets remained under Columbian control, but a huge invasion fleet was preparing to attack the home planet itself.

One last intranebular planet remains to be visited.

The planet has remained under observation by ground and space-based instruments across a broad range of the electromagnetic spectrum.

Because the spheres are concentric, planets will always remain at the same distance from Earth.

Schopenhauer, obsessed with the existence of evil, wrote that it would have been better if our planet had remained lifeless, like the Moon.

We know from numerous observations that the suns and planets in the silent zone remain exactly where they were before.

Not a single planet remains within our control-" "That cannot be!