The term "planetary" refers to anything related to planets, which are large celestial bodies that orbit stars, such as the Sun. Planets can be rocky, like Earth and Mars, or gas giants, like Jupiter and Saturn. They are part of a solar system and can have their own moons and rings. In a broader context, "planetary" can also describe phenomena that affect the entire planet, such as climate change or global warming. These issues require international cooperation and awareness, as they impact ecosystems, weather patterns, and human societies across the globe.