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
.
Where is most of the dark matter in our galaxy thought to exist?
D) Within individual galaxies, dark matter is always concentrated
near the galactic center
, and within clusters it is always concentrated near the cluster center.
Is dark matter all around us?
Dark matter, to the best of our knowledge, is
out there in all directions
. It may be invisible to our eyes, but we can feel its gravitational force. It passes through all the matter in the Universe, including human beings, as though it weren’t there at all.
How much is dark matter worth?
1 gram of dark matter is worth
$65.5 trillion
.
What exactly is dark matter?
Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation. Dark matter is
material that cannot be seen directly
. … Scientists believe that dark matter may account for the unexplained motions of stars within galaxies.
Are souls dark matter?
No
. Dark matter is a not yet fully understood particle that doesn’t interact with light and that accounts for the missing mass needed to explain observed gravitational effects. There is no scientific basis for the concept of a soul; that is a religious / belief / philosophy term…
What is dark matter for dummies?
Dark matter is dark:
It emits no light and cannot be seen directly
, so it cannot be stars or planets. Dark matter is not clouds of normal matter: Normal matter particles are called baryons.
Is there dark matter?
By some estimates, dark matter makes up about 85 percent of all the matter in the universe. … But
it’s never been seen
, and so far no one has fully explained what it might be, although dark matter candidates include weakly interacting massive particles, or WIMPS, primordial black holes and neutrinos.
Why is dark matter so expensive?
Due to
its explosive nature
(it annihilates when in contact with normal matter) and energy-intensive production, the cost of making antimatter is astronomical.
Can humans see dark matter?
Scientists have not yet observed dark matter directly
. It doesn’t interact with baryonic matter and it’s completely invisible to light and other forms of electromagnetic radiation, making dark matter impossible to detect with current instruments.
Can antimatter be dark matter?
I never considered the possibility of antimatter being dark matter
. It is a bit puzzling, though, since one of the core tenets of fundamental physics is CPT symmetry, which essentially says that an antimatter universe should behave exactly the same as a matter universe.
Can we collect dark matter?
Despite the almost overwhelming evidence that
dark matter does indeed exist
, we still don’t know what it’s made of. Detectors scattered around the world have been operating for decades, trying to catch the faint trace of a passing dark matter particle, but to no avail.
Why is space so dark?
But the sky is dark at night, both because
the universe had a beginning so there aren’t stars in every direction
, and more importantly, because the light from super distant stars and the even more distant cosmic background radiation gets red shifted away from the visible spectrum by the expansion of the universe.
What could we do with dark matter?
If we can understand and measure the particle properties of dark matter, we may be able to create conditions that coax it into annihilating with itself, leading to the release of energy via Einstein’s E=mc^2, and the
discovery of a perfect spacecraft fuel
.
Is dark matter faster than light?
Dark matter is therefore non-baryonic,
travelling faster than light
and has a mass half that of a photon.
Is dark matter increasing or decreasing?
The total mass of dark matter is fixed, so as the Universe expands and the volume increases, the density of dark matter drops, just like it does for normal matter. … As space expands, the dark energy density remains constant, rather
than decreasing or increasing
.
