If you're just asking because you want to know, I'm not sure there is a "correct" answer. Stars are powered by different processes depending on where they are in their evolution, and often by more than one process at the same time (for example, it's possible for a star to get part of its power from the proton-proton chain reaction and part of it from the CNO cycle). Neither of those are, strictly speaking, "parts of atoms."
If you're asking because it's on a homework assignment, then ... the answer whoever wrote it was probably looking for is "nucleus."
Cats
Apollo the Greek god had his powers since he was born.
Apollo was the Greek god of music, poetry, prophecy, and healing. He was also associated with the sun and light, and was a skilled archer. Apollo was believed to heal both physical and mental ailments, and was considered the patron of the arts and knowledge.
The Sun's mass remains relatively constant as it burns because the process of nuclear fusion, which powers the Sun, converts mass into energy. This mass-energy conversion maintains a balance that keeps the Sun stable.
because the moon isn't hot. the moon isn't bioluminescent the sun "powers" the moon.
No sun god truly exists, therefore he never actually used his powers.
.... Everyone should know that Superman gets his powers from the yellow sun.. The red sun of Krypton does not give him the special powers he has on Earth..
its the sun
fusion
The sun
The sun.
His powers get cut in half - he still has powers, but they're weak.
Ra is the god of the sun
the sun
Cats
The Sun. "Solar" means that it is somehow related to the Sun.
The fusion of atoms powers the sun and other stars!