How can the sun's rays reach earth when earth is so far away?

Answer 1

The sun is extremely hot, a self sustaining fusion reaction. Between the earth and the sun there is nothing, it is a vacuum. There is therfore nothing to stop or absorb the rays until they hit earths atmosphere.

Answer 2

The sun emits electromagnetic waves that travel through the vacuum of space. These waves, including visible light, heat, and other forms of radiation, reach Earth over the vast distance due to the sun's immense energy and the nature of electromagnetic radiation.

Answer 3

The Sun is visible on approximately half of the Earth's surface at any given time (barring any weather effects blocking the view). It does not shine on only one part of the Earth.