Mighty Milky Way--Orbiting a Planet

I managed to get into a perfect orbit around a planet. Normally, you either land on a planet after being pulled in by its gravity or you slingshot around it without doing a complete revolution. However, the planets in this level appear to be in the perfect positions for you to enter orbit. I did this completely by accident while messing around in the level. I left the game running for a while and the loop showed no signs of ending.