What is Dark Energy?

Dark energy is a theoretical form of energy that permeates all of space and is thought to be the driving force behind the accelerated expansion of the universe. It is distinct from dark matter, which is another mysterious component of the universe that does not emit, absorb, or reflect light, but exerts gravitational effects on visible matter.

Discovery of Dark Energy

The existence of dark energy was first suggested in the late 1990s, when astronomers observed distant supernovae and found that the expansion of the universe was not slowing down as expected, but rather accelerating. This unexpected discovery led to the hypothesis of dark energy as the cause of this accelerated expansion.

Properties of Dark Energy

Dark energy is thought to have a negative pressure, which leads to its repulsive gravitational effect, causing the universe to expand at an accelerating rate. It is currently not well understood and is one of the greatest mysteries in modern physics.

Role of Dark Energy in the Universe

Dark energy is believed to be the dominant force driving the expansion of the universe. While the exact nature of dark energy remains unknown, its presence has profound implications for the ultimate fate of the universe.