the answer to your first question is that without nuclear fusion in the heart of stars there would only be the most basic elements like hydrogen and helium. other elements such as carbon are made when those are fused together different stars can make different elements depending on there size but that all stops at iron once iron is formed it obsorbes the rest of the energy and the star goes supernova. the supernova blasts the stars core outward. because of this the iron or other matter slams into other particles in the process fusing together making heavier elements such as gold or uranium making them so rare.
the overall point being that if there was not nuclear fusion you and me and everything else in the universe would just be a giant gas cloud.
for your second question the answer is as simple as thats just how the universe works.
Garnet is a fusion of ruby and sapphire
A fusion from Steven Universe is when two or more gems collide to make a stronger and bigger gem then what they were before.
Before the stars the meter and meteorites were produced by nuclear fusion in the early universe.
The one who created everything in the Universe
Opal is amethyst and Pearl's fusion
Helium is formed in the universe through nuclear fusion processes that occur in stars. During the fusion of hydrogen atoms in the core of a star, helium is produced as a byproduct. This process releases a large amount of energy and is responsible for the creation of helium in the universe.
Nuclear fusion is the process that powers stars, such as our sun.
A fusion is when two gems feel strong enough together to become a new gem. They are a new person and have new abilities.
fusion reactions in stars
They are related because it is the element most often used in fusion in both the natural and synthesised fusions of the universe. Look up fusion in the sun for more information
The universe's primary source of light is stars. Stars are massive balls of gas that undergo nuclear fusion, generating heat and light that radiates out into space. Other sources of light in the universe include galaxies, quasars, and other celestial objects.
No it's only a part of the cartoon network online universe