Dark energy is not well understood, in fact we’re not even 100% sure it actually exists. It’s something scientists have come up with to explain a variable with regards to physics and recently they calculated just how much dark energy might be out there.
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00:04 Dark energy is not well understood.
00:06 In fact, we're not even 100% sure it actually exists.
00:09 It's something scientists have come up with to explain a variable with regards to physics.
00:14 And recently they calculated just how much dark energy might be out there.
00:18 They found that across the entire universe, dark energy likely makes up some 69% of everything.
00:24 That means only 31% of the universe is made up of matter.
00:27 However, that 31% doesn't only include the matter we can see and calculate, but also dark energy's cousin, dark matter.
00:34 And it just so happens that dark matter makes up an overwhelming proportion of all matter as well.
00:39 With astronomer Muhammad Abdullah saying about that, quote,
00:42 "About 80% is made up of dark matter, whose mysterious nature is not yet known,
00:47 but may consist of some as-yet-undiscovered subatomic particles."
00:51 Dark energy exerts a negative repulsive pressure in the universe, sort of an opposite effect of gravity.
00:56 It's a force rather than a substance like matter.
00:59 And while we observe its effects on other objects, scientists are still unsure about what it is or exactly how it works.
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