A planet must either Spiral Away From or Into the sun.

I already told you ( and others, via direct replies )
that I was wrong about that, so give it a rest why don't you ?
A simple orbit doesn't spiral away.

In “ et ”
Keith_L had the best comment:

The moon might've once had a stable orbit 5,000 miles from the Earth.

Slowly, the earth is spiraling away from the sun.
Earth's spinning tides also affect it's orbit with the sun
( not just the moon ) and the sun is losing mass.