The sun produces energy and helium from hydrogen by nuclear fusion. The picture shows the proton-proton-cycle astronomy astrophysics beta Pp-cycle
The SPI resin identification coding system is a set of symbols placed on plastics to identify the polymer type. Bonus Unicode & Green Dot Symbol spi unicode coding Resin identification code
The SPI resin identification coding system is a set of symbols placed on plastics to identify the polymer type. Bonus Unicode & Green Dot Symbol. green identification pp Resin identification code
The sun produces energy and helium from hydrogen by nuclear fusion. The picture shows the proton-proton-cycle. energy neutrino decay Pp Cycle