Simplify the following text for a Grade 12 native English-speaking person.
Original: Milankovitch theory predicts the planet will continue to undergo glaciation cycles because of eccentricity , axial tilt , and precession of the Earth 's orbit .
Simplified: The Milankovitch theory says the planet will continue to go into glaciation cycles because of the planet 's difference in orbit from a perfect circle , the axis of the planet tilting , and pushing of the Earth 's orbit .