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Some scientists think that dark energy is a fundamental, ever-present background energy in space known as vacuum energy, which could be equal to the cosmological constant, a mathematical term in the equations of Einstein's theory of general relativity.
But there’s more to the universe than the matter we can see. Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out. Learn more.
Hubble observations suggest the dark energy may be Einstein's cosmological constant, an energy percolating out of the vacuum of the space between galaxies. The energy of the universe is dominated by empty space emitting a repulsive form of gravity that is pushing the universe apart.
The new mission will advance the exploration of the dark energy mystery in ways that other telescopes can’t by mapping how matter is structured and distributed throughout the cosmos, and also by measuring large numbers of distant supernovae.
Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out. The universe is made up of three components: normal or visible matter (5%), dark matter (27%), and dark energy (68%).
Help illuminate the mystery of dark energy - the unknown force that is driving galaxies away from one another! Dark Energy Explorers are creating the largest and most detailed map yet of galaxies in the early universe.
Dark energy makes the whole universe expand faster and faster! But what causes this spectacular process? Join NASA’s newest citizen science project, Dark Energy Explorers, and help figure out this puzzle.
These ghostly forms of energy and matter are only detectable by the effects they have on the stuff we can see. The invisible form of matter, called dark matter, makes up roughly 30% of the universe’s total mass.
Hubble made the key observations that led to the discovery of dark energy. Astronomers looked at a special kind of supernovae, called Type 1a, that give off a set amount of light when a certain type of star explodes.
We call this substance dark matter, an invisible form of matter that doesn’t emit, absorb or reflect light, or interact with normal matter. It’s theorized to make up 85 percent of the universe’s total mass, or almost 30 percent of the universe’s combined mass-energy.