Meet Dark Energy | #shorts #darkenergy
Channel: Quantum Leap
Date: 11/02/2024

What is dark energy?
Scientists are not exactly sure, but there's something called dark energy forcing the universe to expand faster. It's like a mysterious force, and about 70% of everything in the universe is this dark energy.
Scientists first thought that the expansion might be slowed down by gravity over time, backed by Einstein’s theory of general relativity.
In 1929, Edwin Hubble confirmed that the universe was expanding using observations on the redshift of spiral galaxies. 
Dark energy wasn't discovered until the late 1990s.
But in 1998, astronomers found that the supernovae had traveled farther away from us and faster than anticipated. They ultimately conclude that the universe itself must be expanding faster over time.
Additional evidence that emerged later has bolstered support for this concept, giving rise to the phenomenon now known as cosmic acceleration.
But, they also asked: Why? What could be driving the universe to stretch out faster over time?
Enter dark energy.