Matter đź‘‘
Perhaps most humbling is that the "normal" matter we see—stars, planets, and people—accounts for only about . The rest is dark matter (roughly 27%) and dark energy (roughly 68%). Dark matter provides the gravitational "glue" that holds galaxies together, yet it does not emit, absorb, or reflect light, remaining entirely invisible to our current instruments. Conclusion
At the quantum level, the definition of matter becomes even more elusive. According to the , matter is composed of quarks and leptons. Yet, Einstein’s famous equation, matter
Matter is the bridge between the mathematical laws of physics and the tangible reality of our lives. It is the vessel for complexity and, ultimately, for life itself. We are, as Carl Sagan famously noted, "star stuff"—collections of ancient atoms forged in the hearts of dying suns, organized in such a way that the universe can finally look back at itself and wonder what it is made of. Perhaps most humbling is that the "normal" matter