Short Wave SPACE WEEK: The Mystery Of Dark Energy
Aug 31, 2020
Delve into the mysteries of dark energy, which makes up nearly 70% of the universe! Discover how historical theories, from Einstein's cosmological constant to today's astrophysical foundations, shape our understanding. Learn about the astonishing fact that only 5% of the universe is known matter, highlighting the vast unknowns that motivate scientists. Explore how supernovae reveal cosmic expansion and the dynamic role dark energy plays in determining the universe's fate. Prepare for a fascinating journey through the cosmos!
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The Universe's Composition
- Normal matter like us, trees, and planets makes up only 5% of the universe.
- The rest consists of dark matter and dark energy, a mysterious majority.
Einstein's Cosmological Constant
- Einstein's cosmological constant, initially a "fudge factor" for a static universe, is now considered key to understanding dark energy.
- Although he called it his "biggest blunder", it describes our expanding universe.
Hubble's Expanding Universe
- Edwin Hubble's 1929 measurements showed that galaxies are moving away from us.
- This discovery proved that the universe is not static, but expanding.