Cosmology dark matter

How was dark matter observed?
But if we cannot see dark matter, how do scientists know it is there? The answer is gravity.
Astronomers indirectly detect dark matter through its gravitational influences on stars and galaxies.
Wherever normal matter resides, dark matter can be found lurking unseen by its side..
Is 99% of the universe dark matter?
At the present time, even though many experiments are underway to detect dark matter particles, none have been successful.
Nevertheless, astronomers still believe that somewhere between 30% and 99% of the Universe may consist of dark matter..
Is dark matter part of the observable universe?
Dark matter is not situated outside the 'observable universe', it is mainly expected to be found clumped together surrounding most of the galaxies in our universe as dark matter halos..
Is the universe 95% dark matter?
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..
What is the dark fluid in cosmology?
Overview.
Dark fluid is hypothesized to be a specific kind of fluid whose attractive and repulsive behaviors depend on the local energy density.
In this theory, the dark fluid behaves like dark matter in the regions of space where the baryon density is high..
What is the science of dark matter called?
Answer and Explanation:
The study of dark matter falls into the category of astrophysics; this branch of astronomy utilizes the theories and principles of physics and chemistry to make determinations regarding certain astronomical objects..
About 20% of the matter in galaxies is visible or baryonic: subatomic particles like protons, neutrons and electrons.
The other 80%, referred to as “dark matter”, remains mysterious and unseen.
In fact, it may not exist at all. “Dark matter” is just a hypothesis.
Despite its name it can't simply be made up of dead stars, gas and dust.
Dark matter has to consist of something more exotic than standard atomic particles to ensure the Big Bang produces a universe chemically similar to the one we see.
The cosmic space of universe is expanding, carrying clusters of galaxies with it.
But galaxy clusters, and the galaxy they hold, stay together, bound by the gravity of dark matter.

Galaxies rotate fast. So fast that the gravity generated by stars, dust and gas could not possibly hold them together. This led astronomers to believe that galaxies are surrounded by a halo of invisible dark matter, but despite being suggested almost 100 years ago, the nature of this dark matter remains enigmatic.

In principle, "dark matter" means all components of the universe which are not visible but still obey ρ ∝ a⁻³ . In practice, the term "dark matter" is often used to mean only the non-baryonic component of dark matter, i.e., excluding "missing baryons".

In principle, "dark matter" means all components of the universe which are not visible but still obey ρ ∝ a−3 . In practice, the term "dark matter" is often HistoryTechnical definitionObservational evidenceTheoretical classifications

Cosmology dark matter

How was dark matter observed?

Is 99% of the universe dark matter?

Is dark matter part of the observable universe?

Is the universe 95% dark matter?

What is the dark fluid in cosmology?

What is the science of dark matter called?