Dark Energy
A hypothetical form of energy that is thought to be responsible for the observed acceleration of the universe's expansion.
Unlike dark matter, which pulls things together gravitationally, dark energy is thought to exert a repulsive force, pushing space apart. It accounts for approximately 68% of the total mass-energy content of the universe.
Commonly confused with
- Dark Matter: Dark Energy is a hypothetical form of energy causing accelerated expansion, while Dark Matter is a hypothetical form of matter that exerts gravitational pull.
Collocations
- dark energy model
- dark energy research
- cosmic dark energy
Example sentences
- "The discovery of the accelerating expansion of the universe led to the hypothesis of Dark Energy." Discussing cosmic expansion.
- "The nature of Dark Energy remains one of the most profound puzzles in modern physics, driving intense research efforts." Referring to a scientific model.
Memory hook
It's 'DARK' because it's unknown, and it's 'ENERGY' because it powers the universe's expansion. Invisible Expansion Force
When not to use
Do not use 'dark energy' to refer to negative emotions, hidden power, or any non-scientific concept. It is a specific cosmological term.
Fun facts
- Dark energy is thought to be a property of space itself, or a new type of dynamic energy field.
- The existence of dark energy was inferred from observations of distant supernovae, which appeared fainter than expected, indicating they were further away due to accelerated expansion.
Related words
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