Question

solar energy is caused by nuclear fission or nuclear fusion

Answer 1

nuclear fusion occurs on the sun.that is an uncontrolled chain reaction which is non radioactive.nuclear fission could be carried on earth.

Answer 2

Answer:

The source of the sun's energy is Nuclear Fusion :) Basically, the heat generated within the sun causes the nuclei which would normally repel one another (because they both have a positive charge) to bang into one another and fuse. As a result of the fusion, a new atom is created.