- What does dark energy do?
- Is the universe infinite?
- Is dark energy faster than light?
- Is dark energy everywhere?
- How does dark matter affect us?
- Is dark energy negative energy?
- How dangerous is dark matter?
- Is dark matter proven?
- What is the opposite of dark energy?
- Can gravitons be dark matter?
- Does dark matter have mass?
- Why is attractive energy negative?
- What could dark matter be?
- Can we detect dark energy?
- How much is dark matter worth?
- Can Dark Matter give you powers?
- Why is dark matter important?
- Is dark matter just planets?
- How much dark energy is in the universe?
- Where is dark matter found?
What does dark energy do?
Dark energy is the name given to the mysterious force that’s causing the rate of expansion of our universe to accelerate over time, rather than to slow down.
That’s contrary to what one might expect from a universe that began in a Big Bang.
Astronomers in the 20th century learned the universe is expanding..
Is the universe infinite?
Because we live in three dimensions, 250 times the radius means (250)3 times the volume, or more than 15 million times as much space. But, big as that is, it still isn’t infinite. A lower bound of the Universe being at least 11 trillion light years in all directions is tremendous, but it’s still finite.
Is dark energy faster than light?
As dark energy causes the universe to expand ever-faster, it may spur some very distant galaxies to apparently move faster than the speed of light. … Over and over (and over and over) we’re told the supreme iron law of the universe: Nothing — absolutely nothing — can go faster than the speed of light.
Is dark energy everywhere?
DARK energy is everywhere – and when we say everywhere, we mean everywhere. It suffuses every corner of the cosmos, absolutely dominating everything in it. It dictates how the universe behaves now and how it will end. … Be that as it may, it makes up a whopping 68 per cent of all the universe’s matter and energy.
How does dark matter affect us?
Dark matter binds galaxies together Dark matter exerts ‘gravitational force’, meaning that it draws other matter towards it. And there’s so much dark matter that its gravitational force is enough to hold entire galaxies – like our own Milky Way – together.
Is dark energy negative energy?
Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity. It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion.
How dangerous is dark matter?
Dark Matter a Danger? Because WIMPs don’t have strong effects on normal matter, collisions inside the human body shouldn’t pose much danger. But when WIMPs collide with each other, their annihilation is a much more energetic reaction.
Is dark matter proven?
Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies. The discovery, using NASA’s Chandra X-ray Observatory and other telescopes, gives direct evidence for the existence of dark matter.
What is the opposite of dark energy?
ultralightA dimensional expansion of the cosmological Friedmann Equation of energy has a clear place for them. Such energies would affect the universe much differently than dark energies, and so are here dubbed “ultralight.” As the universe expands, ultralight dilutes even faster than light.
Can gravitons be dark matter?
We consider the possibility that the massive graviton is a viable candidate of dark matter in the context of bimetric gravity. We first derive the energy-momentum tensor of the massive graviton and show that it indeed behaves as that of dark matter fluid.
Does dark matter have mass?
Thus, dark matter constitutes 85% of total mass, while dark energy plus dark matter constitute 95% of total mass–energy content. Because dark matter has not yet been observed directly, if it exists, it must barely interact with ordinary baryonic matter and radiation, except through gravity.
Why is attractive energy negative?
The strength of the gravitational attraction between two massive objects over the distance between them represents a negative amount of gravitational potential energy in the field which attracts them.
What could dark matter be?
Some believe that it may be normal objects such as cold gasses, dark galaxies, or massive compact halo objects (called MACHOs, they would include black holes and brown dwarfs). Other scientists believe that dark matter may be composed of strange particles which were created in the very early universe.
Can we detect dark energy?
Unlike normal matter, dark matter does not interact with the electromagnetic force. This means it does not absorb, reflect or emit light, making it extremely hard to spot. In fact, researchers have been able to infer the existence of dark matter only from the gravitational effect it seems to have on visible matter.
How much is dark matter worth?
It would be about 1 million trillion trillion dollars per ounce. The LUX experiment costed 10 million dollars to build.
Can Dark Matter give you powers?
In the game series Mass Effect, dark matter is manifested in the form of a substance called “Element Zero”, which is informally referred to as “eezo”. The dark energy that eezo produces is harnessed to power FTL travel, and prenatal exposure to eezo is capable of giving humans telekinetic abilities.
Why is dark matter important?
Dark matter is the most mysterious, non-interacting substance in the Universe. Its gravitational effects are necessary to explain the rotation of galaxies, the motions of clusters, and the largest scale-structure in the entire Universe. … Without dark matter, the Universe would likely have no signs of life at all.
Is dark matter just planets?
However, dark matter does not emit any radiation at all (hence the name dark!) … So, because of these reasons the dark matter in galaxies and in galaxy groups/clusters cannot be baryonic, and so cannot be planets, dead stars, asteroids, etc.
How much dark energy is in the universe?
It turns out that roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest – everything on Earth, everything ever observed with all of our instruments, all normal matter – adds up to less than 5% of the universe.
Where is dark matter found?
The first variety is about 4.5 percent of the universe and is made of the familiar baryons (i.e., protons, neutrons, and atomic nuclei), which also make up the luminous stars and galaxies. Most of this baryonic dark matter is expected to exist in the form of gas in and between the galaxies.