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I did plan on introducing information I've found on multiple stars, variable and pulsating stars however the details are increadibly physics heavy and my own understanding is awkward hence I'd rather not try to explain it to someone else.

So after concluding the constellation curiousity, and before I find something else to look into;
Dark matter,
Which serves as gravitational glue of the universe. At first was presumed that the stars orbited th  galaxy like the planet  orbit the sun; however, that was debunked by Vera Rubin and Kent Ford, that the stars, outlying and inner, moved at the same speed. The conclusion they found was that the visible matter makes up only a small portion of the galaxy.
Each spiral galaxy has a "halo" surrounding it made of dark matter, this controls via gravity, stars in the visible outskirts. The dark matter [must] exceed visible matter by 10 in mass.
NASAs fermi Gamma-ray space telescope webpage.
This helped understand and I highly doubt I could  do a better job of explaining, although dark matter was explained to me that "if galaxies are sea foam, dark matter is the ocean in which it floats."
ANTI- matter, predicted by Paul Dirae in 1929. He found that, for every subatomic particle, identical in mass, but with an opposite electrical charge. When a particle and its nanoparticles meet, they annihilate each other. Their electrical charges are cancelled out and their mass is converted to pure energy.