What is DARK MATTER and DARK ENERGY?

The matter is something that has mass and occupies space, like the trees around us, the stars, galaxies, birds, stars, rocks, etc, but still, these things occupy only 5% of known energy and matter and there is a lot more to see and explore. 

About 25% is dark matter and 70% is dark energy. Both of which are invisible. It is really strange to hear that what we experience is really very low compared to reality. It is really worse that we don't have any clue about what is dark matter and energy and how does it work. Actually, dark matter is the stuff that made galaxies possible. When we understand Galaxy it makes a way for us that there is no enough normal matter. The gravity of the seen matter is not so strong to form complex structures in the universe, so there is something else that makes this possible. It is something that does not give or reflect light.  It is possible to calculate the dark matter. Places with a high concentration of dark matter make the place non-luminous and bend the light. Here it shows that there is something that interacts with gravity.  Dark matter is anti-matter as it produces unique gamma rays when it gets reacted with the matter. Dark matter is also not made up of black holes or any wild objects that affect the surroundings, it is scattered all over the place.

Now we only got to know that there is something out there other than the visible matter and which interacts with gravity and it is a lot more.

Now coming to dark energy, it is even more mysterious and suspicious, It is undetectable but it has an impact. In the year 1929, Edward Hubble examined how the wavelength of light is emitted by the galaxies and the thing in the space, towards the red end of the electromagnetism spectrum as it travels through space. he found that more distant galaxies showed a large degree of redshift than the closer one. Hubble determined that this caused because the universe is expanding. The redshift occurs because of the wavelength of light is stretched as the universe expands. Recent studies show that the expansion of the universe is accelerating. Space does not change its properties while it expands. New space is created everywhere and every time constantly. Galaxies are held together with gravity, so we are unable to feel the expanding universe in our everyday life. Every single time there are some spaces forming in the universe. Empty spaces have more energy compared to anything in the universe that is combined. There are may ideas about dark energy and how is it. The dark energy nothing, but a property of some space. But empty space has its own energy. It is active and generates more space.so the universe expands and has space.  

The next one is the cosmological constant that was told by einstein in 1917, that, A force that attracts objects toward it is gravity and while calculating the dark energy is not known at all. The next one is that space is full particles and it forms temporarily and disappears into nothing. These can be something about the dark energy,

But whatever it is there is something that is not known and not seen.