Question

What happens during the Main Sequence phase of a star?

• A. Hydrogen atoms are fused into helium atoms
• B. The star explodes and releases energy
• C. Helium atoms are fused into heavy elements
• D. The star is born out of dust and gas

Answer 1

The correct option is A Hydrogen atoms are fused into helium atoms

Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars.