Those who study astronomy check out the construction and origin of the universe such as the stars, planets, galaxies and black holes that reside in it. Astronomers intention to reply basic questions on our universe through idea and observation. The Pinwheel Galaxy, NGC 5457 Spiral galaxies resemble spiraling pinwheels. https://www.etsy.com/listing/775754649/star-map-home-the-night-sky-birthday-mom