The brief history of the Sun which we included in these pages gives you a comprehensive and perhaps complicated introduction to the Sun as a star in our galaxy, the Milky Way.
Stars are very different objects than are planets.
They are very large and are giving off immense amounts of radiation. On a sheet of paper, draw two parallel lines very very very close together, about a pencil lead width. Measure the distance between them and record it. Slide the paper up or down along the edge of the stick so that the sunlight coming through the hole in the index card just fills the space between the little parallel lines drawn on the paper. Students should understand the idea of ratios, factors of difference between two sizes.