Planets in example sentence
And this is a question that people wondered when they looked at our solar system, because planets closer to the Sun are rocky, and planets further away are bigger and more gaseous.
More example sentences with word planets
And what starts happening is that, around young suns, young stars, all these elements combine, they swirl around, the energy of the star stirs them around, they form particles, they form snowflakes, they form little dust motes, they form rocks, they form asteroids, and eventually, they form planets and moons. 
