"Research has demonstrated that peptides, crucial organic compounds, can form on cosmic dust particles even in the presence of water. This challenges previous beliefs and suggests that the formation of life’s building blocks in space is feasible, despite the conditions. Credit: SciTechDaily.com" (ScitechDaily, Interstellar Peptides Point to Extraterrestrial Origin of Life’s Building Blocks) Supernova and kilonova explosions are the most violent cases in the universe. The power of that shockwave can form new elements. But when a shockwave traveled long enough in the universe. Its power decreased. When that shockwave impacts the interplanetary nebula there is oxygen and hydrogen that shockwave can push those atoms together, forming water molecules. Nuclear reactions form oxygen, and there is oxygen in the old star's atmosphere. We can say that all stars have Oort clouds. Oort clouds are distant very cold asteroids that stars can capture around them from interstellar space.