Question

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Q. What is dark energy? ( describe full)

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Answer 1

DARK ENERGY:-

Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity. It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion. Like Dark Matter, Dark Energy is not directly observed, but rather inferred from observations of gravitational interactions between astronomical objects.

Dark Energy makes up 72% of the total mass-energy density of the universe. The other dominant contributor is Dark Matter, and a small amount is due to atoms or baryonic matter.

It can also be said as:

Energy in the universe associated with the fact that the expansion of the universe is accelerating and the COMOLOGICAL CONSTANT put forward by Einstein that could have a non-zero value analysis from the WMAP [wilkinson microwave anissotopy probe satellite].

Nothing for sure can be said about dark energy an everyone has their own hypohesis on it. No one has a clead idea on what Dark Matter actually is as it it the worst understood topic in the whole of Astrophysics.

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