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dark energy
[ dahrk en-er-jee ]
noun
- a hypothetical form of energy whose negative pressure counteracts gravity and is assumed to be responsible for the universe expanding at an accelerating rate.
dark energy
- A form of energy hypothesized to reside in the structure of space itself, responsible for the accelerating expansion of the universe. Dark energy theoretically counterbalances the kinetic energy of the universe's expansion, entailing that that the universe has no inherent curvature, as astronomical observations currently suggest. Dark energy appears to account for 73 percent of all the energy and matter in the universe.
- See also big bang
Notes
51Թ History and Origins
Origin of dark energy1
Example Sentences
The mysterious force called Dark Energy, which drives the expansion of the Universe, might be changing in a way that challenges our current understanding of time and space, scientists have found.
The discovery of Dark Energy in 1998 was in itself shocking.
Although we don't know what Dark Energy is - it is one of the greatest mysteries in science - astronomers can measure it and whether it is changing by observing the acceleration of galaxies away from each other at different points in the history of the Universe.
"Dark Energy appears to be even weirder than we thought," she told BBC News.
They had no idea what the force driving this was, so they gave it a name signifying their lack of understanding - Dark Energy.
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