Planets in example sentence
We've gone, in 20 years, from knowing of zero planets outside of our solar system, to now having so many, that we don't know which ones to investigate first.
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. 
