Simply because - sound cannot travel in the vacuum of space.
The nuclear reactions in the Suns core
The nuclear reactions in the Sun primarily involve fusion of hydrogen nuclei to form helium, releasing energy in the process. In a nuclear reactor, the reactions typically involve fission of heavy nuclei like uranium or plutonium, releasing energy through splitting these nuclei. The conditions and mechanisms governing the reactions in the Sun and in a nuclear reactor are different due to the vastly varying scales and environments of the two systems.
Because sound doesn't travel through the vacuum of space.
Nuclear reactions in a nuclear reactor are controlled reactions. The reactions in the atomic bomb are not controlled reactions
Chemical reactions
Helium
The sun's nuclear reactions are based on fusion of atoms (hydrogen atoms are fused together to form helium or lithium mainly) whereas earth-bound nuclear reactions are based on fission (uranium atoms are smashed apart to form (often radioactive) fragments and energy) There has been research on earth-bound nuclear fusion for many years (JET project in the UK) and ITER, but there is still a long way to go before we can mimic the sun!
nuclear fission and nuclear fusion
nuclear reactions
Nuclear Fusion. This process involves 'fusing' together two smaller nuclei to form a bigger nucleus.
nuclear fusion reactions at the core of sun
Yes, at temperatures around 15.6 million degrees Celsius in the Sun's core, nuclear fusion reactions can occur. These reactions involve the fusion of hydrogen nuclei into helium nuclei, releasing immense amounts of energy in the form of light and heat.