The
visible universe is full of stars, planets and gaseous nebulae, however, after
doing calculations, it is known that there are some things in the universe that
we cannot see. What are these invisible objects or materials?
for
galaxies to maintain their position, they must have a fixed mass moving at a
certain rate, but research based on the light emitted from stars suggests that
the number of stars in galaxies is very small. Due to the gravitational force
created by the presence of the most massive universal bodies, the light coming
from the most distant galaxies is bent as it passes by these bodies. But it is
often observed that the amount of deflected light is very high, indicating that
a larger, invisible wave is affecting the light.
Astronomers
believe that invisible dark matter can be the cause of this decrease in
gravitational force. In addition, the universe is expanding at an accelerated
rate, which can be caused by the gravitational force, which is called dark
energy.
We
can use Einstein's famous equation E = mc2 to determine the amount of matter in
the universe with the help of energy, which tells us how much of the universe
is made up of invisible matter and invisible energy. But we still don't know
much about these components. Visible stars and galaxies make up only 4.6
percent of the visible matter in the universe, while other objects are made up
of unknown components called invisible matter (23.3 percent) and invisible
energy (72.1 percent). Other companions of missing matter are neutrinos and
weakly interacting massive particles (WIMPs). The missing energy is even more
mysterious. Scientists are building detectors deep in the Earth to detect WIMPs
and other missing matter particles (the reason for making them deep in the
Earth is to protect them from other particles coming from space). There is a
strong possibility that these particles create an extra gravitational force.
Invisible energy is even more confusing as there is no reliable theory about
its formation. It's hard to find because it's so hard to measure it, as well as
what caused the universe to expand so fast.
