lunar cycle
star
moon
tide
sun
satellite
revolution
orbit
rotation
an object that travels or revolves around another object; can be natural or artificial
natural satellite that revolves around Earth
changes in the moon's appearance as it orbits the Earth; also called phases of the moon
the path an object takes around another object
the rise and fall of Earth's oceans twice a day due to the gravitational pull of the moon
medium-sized star that is located in the middle of our solar system and is the source of almost all energy on Earth
an object in the sky made of very hot spinning gases
a complete trip around another object
the spinning of an object on its axis
