What is Dark Energy? Inside our accelerating, expanding Universe
2024年2月5日 · Right now, dark energy is just the name that astronomers gave to the mysterious "something" that is causing the universe to expand at an accelerated rate. Dark energy has been described by some as having the effect of a negative pressure that is pushing space outward.
Dark Matter & Dark Energy - Science@NASA
Matter is defined as any substance that has mass and occupies space. 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.
Dark Energy Changes the Universe - Science@NASA
2004年2月27日 · 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 …
Dark Energy - NASA Science
Scientists have discovered that a mysterious pressure dubbed “dark energy” makes up about 68% of the total energy content of the cosmos, but so far we don’t know much more about it. Roman will help illuminate the dark energy puzzle by using multiple methods to explore how the universe has evolved throughout cosmic history.
Building Blocks - NASA Science
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%).
Hubble Dark Energy - Science@NASA
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.
Hubble Dark Matter - Science@NASA
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.
Dark Matter - Science@NASA
Dark matter provides the surplus gravity. Scientists have confirmed earlier observations by measuring how much matter in the very early universe is “normal” and how much is “dark” using experiments like NASA’s Wilkinson Microwave Anisotropy Probe (WMAP).
Shining a Light on Dark Matter - NASA Science
More than 80% of the universe is made of stuff we have never seen. 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.
Dark Energy Explorers - Science@NASA
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.