Question

What is dark matter?
What is dark energy?
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Answer 1

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• Dark matter is the name we give to all the mass in the universe that remains invisible, and there's a whole lot of it. Research suggests that about 70% of the universe is composed of dark energy, whilst the remaining 25% is composed of a mysterious substance known as dark matter.
• 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.

Answer 2

What is dark matter?

Dark matter is the name we give to all the mass in the universe that remains invisible, and there's a whole lot of it. Research suggests that about 70% of the universe is composed of dark energy, whilst the remaining 25% is composed of a mysterious substance known as dark matter.

What is dark energy?

Dark energy is the name given to the mysterious force that's causing the rate of expansion of our universe to accelerate over time, rather than to slow down. That's contrary to what one might expect from a universe that began in a Big Bang. Astronomers in the 20th century learned the universe is expanding.

Explanation:

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