dark energy
repulsive property with constant energy density theorized to make up most of the universe’s energy content to account for its observed expansion
Common Themes
Videos Mentioning dark energy
Leonard Susskind on Richard Feynman, the Holographic Principle, and Unanswered Questions in Physics
Y Combinator
A mysterious energy that permeates all of space and tends to accelerate the expansion of the universe. The puzzle, according to Susskind, is not why it exists, but why its value is so incredibly small compared to theoretical expectations.
Brian Greene: Quantum Gravity, The Big Bang, Aliens, Death, and Meaning | Lex Fridman Podcast #232
Lex Fridman
A mysterious force thought to be responsible for the accelerating expansion of the universe, whose value (a tiny, specific number) poses a significant puzzle to physics.
Peter Woit: Theories of Everything & Why String Theory is Not Even Wrong | Lex Fridman Podcast #246
Lex Fridman
A component of the universe that causes its expansion to accelerate. Mentioned as an example of something in the real world that doesn't fit into the current fundamental theory.
Michio Kaku: Future of Humans, Aliens, Space Travel & Physics | Lex Fridman Podcast #45
Lex Fridman
The hypothesized energy of empty space, making up 73% of the universe's energy, responsible for cosmic acceleration.
Barry Barish: Gravitational Waves and the Most Precise Device Ever Built | Lex Fridman Podcast #213
Lex Fridman
A mysterious force that represents most of the universe, posing a complete puzzle that goes against Einstein's general relativity and was not a known question when Barish was a student.
Harry Cliff: Particle Physics and the Large Hadron Collider | Lex Fridman Podcast #92
Lex Fridman
An invisible component making up 95% of the universe along with dark matter, not yet understood.
Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics | Lex Fridman Podcast #359
Lex Fridman
A mysterious form of energy causing the universe's expansion to accelerate, equivalent to Einstein's cosmological constant, and a significant puzzle in modern physics.
Alex Filippenko: Supernovae, Dark Energy, Aliens & the Expanding Universe | Lex Fridman Podcast #137
Lex Fridman
A weird repulsive effect causing the acceleration of the universe's expansion, which might be quantum fluctuations of the vacuum or a new energy field.
Doctor Asks Physics Questions (ft @MedlifeCrisis)
Sabine Hossenfelder
Mentioned alongside dark matter as a significant component of the universe that remains to be fully understood.
How to Build a Universe: A Conversation with Frank Wilczek (Episode #238)
Sam Harris
The intrinsic density that 'empty' space-time possesses, also referred to as the cosmological constant by Einstein.
The birth, life and death of the universe – Public lecture by Dr. Don Lincoln
Fermilab
A mysterious form of energy causing the universe's expansion to accelerate.
Is Dark Energy made of Black Holes?
Sabine Hossenfelder
The mysterious force responsible for the universe's accelerating expansion, comprising about 72% of the universe's energy density. Its defining property is negative pressure.
How good is the evidence for Dark Energy?
Sabine Hossenfelder
The core topic of the video, with a re-examination of the evidence supporting its existence.
#askFermilab: Dark Matter Day Q&A
Fermilab
A mysterious force causing the accelerated expansion of the universe, distinct from dark matter.
Lisa Randall Interview (Full Episode) | The Tim Ferriss Show (Podcast)
Tim Ferriss
Described as 'the most profound mystery in all of science' by astrophysicist Michael Turner, it refers to the empty space that is not truly empty.
Lee Cronin: Origin of Life, Aliens, Complexity, and Consciousness | Lex Fridman Podcast #269
Lex Fridman
A mysterious force thought to be responsible for the accelerating expansion of the universe. Lee Cronin speculates it might be related to time itself or the consequences of time, potentially hinting at non-conservation of energy in the universe.