- A galaxy is a group of stars held together by gravity, with some containing planets orbiting them.
- The Earth is part of the Milky Way galaxy, which is one of billions of galaxies in the universe.
- Galaxies can be categorized into three main types: Elliptical (smooth and oval-shaped), Irregular (no regular shape, looks like a blob), and Spiral (curved arms making it look like a pinwheel).
- The solar system is located within the Milky Way galaxy.
- Planets are celestial bodies that orbit stars; the term "solar system" specifically refers to our Sun and its orbiting planets.
Parent Tip: Review the logic above to help your child master the concept of types of galaxies worksheet.