If you think the size of the source object is large, consider the size of space its viewable from. If you see a spec of light from a star, that same spec is vis

If you think the size of the source object is large, consider the size of space its viewable from. If you see a spec of light from a star, that same spec is visible from every point on a sphere around it (ish) Now consider the size of the sphere! It's amazing anything reach us at all.