Ordinary matter — stars, planets, gas, dust and us — contributes only about 5% of the universe's total energy density. Current cosmological measurements indicate roughly 27% dark matter and 68% dark energy.
But dark matter and dark energy are very different mysteries. Dark matter reveals itself through gravitational effects on galaxies, galaxy clusters and the cosmic web. Dark energy is the name given to whatever drives the observed accelerated expansion of the universe.
In this video:
- The 5% / 27% / 68% cosmic breakdown
- Evidence for dark matter
- How gravitational lensing reveals invisible mass
- How scientists search for dark-matter particles
- What dark energy actually means
#shorts #darkmatter #darkenergy #space #cosmology #astronomy #physics #science
