* Orbiting the Sun: All planets orbit the Sun in a roughly elliptical path, due to the Sun's gravitational pull.
* Made of Matter: They are all composed of matter, primarily hydrogen and helium, but with variations in composition depending on their formation and distance from the Sun.
* Spherical Shape: Due to their own gravity, all planets are approximately spherical.
* No Fusion: They are not massive enough to sustain nuclear fusion, unlike stars.
* Part of the Solar System: They are all part of the same system, formed from the same protoplanetary disk.
While these are the primary similarities, planets also have a wide range of differences in size, composition, atmosphere, temperature, and more.
