Concept
Quasi-satellite
A body that appears to orbit a planet but doesn't.
An object co-orbiting the Sun with a planet, appearing from the planet to loop around it without being gravitationally bound.
Overview
An object co-orbiting the Sun with a planet, appearing from the planet to loop around it without being gravitationally bound.
See also
Obliquity
The tilt of a planet's axis to its orbit.
Kepler's Laws
The three laws of planetary orbits.
Exoplanets
Worlds orbiting other stars.
The Habitable Zone
Where liquid water can exist on a planet's surface.
Perihelion
The closest point in an orbit to the Sun.
Aphelion
The farthest point in an orbit from the Sun.