Dark Matter ✭ 【POPULAR】

It provides the "glue" that keeps galaxies from flying apart.

Dark matter makes up roughly , dwarfing the "ordinary" matter—stars, planets, and people—which accounts for less than 5%. Dark Matter

Scientists discovered dark matter not by seeing it, but by noticing that the universe's "math" didn't add up without it. Galaxy Rotation Curves It provides the "glue" that keeps galaxies from flying apart