Dark Energy and Dark Matter

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" What is Dark Energy and Dark Matter..?? "


" Is it possible for us to observe it..?? "

 
Dark Energy or Dark Matter(artist's imagination)
Dark Energy or Dark Matter(artist's imagination)

Firstly, let us understand the fundamentals....

Dark Energy :

In physical cosmology and astronomy, Dark energy is an unknown form of energy that affects the universe on the largest scales. The first observational evidence for its existence came from supernovae measurements, which showed that the universe does not expand at a constant rate, rather the expansion of the universe is accelerating. Understanding the evolution of the universe requires knowledge of its starting conditions and its composition. Prior to these observations, the only forms of matter-energy known to exist were ordinary matter, dark matter, and radiation. Measurements of the