What is Dark Matter and Dark Energy?
Kurzgesagt – In a Nutshell・2 minutes read
Less than 5% of the known universe is made up of visible matter, with dark matter and dark energy comprising the rest, playing crucial roles in the formation and expansion of galaxies. Dark matter interacts through gravity, bending light, while dark energy, intrinsic to empty space, accelerates the universe's expansion, with theories proposing different origins and properties.
Insights
- Dark matter, comprising 25% of the universe, plays a crucial role in galaxy formation by providing the necessary gravitational pull that visible matter alone cannot achieve.
- Dark energy, constituting 70% of the universe, acts as a powerful force driving the universe's expansion at an accelerating pace, surpassing the strength of any other known energy source, despite its mysterious nature and origins.
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Recent questions
What makes up the majority of the known universe?
Dark matter and dark energy
How does dark matter affect the formation of galaxies?
Essential for galaxy formation due to gravity
What is the main characteristic of dark energy?
Causes the universe to expand at an accelerating rate
How does dark matter interact with light?
Bends light passing nearby, indicating its presence
What is the current rate of expansion of the universe?
Expanding at an accelerating rate
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Summary
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"Dark Matter and Energy: Invisible Universe Secrets"
- Less than 5% of the known universe is made up of matter, with 25% being dark matter and 70% dark energy, both of which are invisible.
- Dark matter is essential for the existence of galaxies as the gravity of visible matter alone is insufficient to form complex structures like galaxies.
- Dark matter interacts with gravity, bending light passing nearby, indicating its presence, although its exact nature remains unknown.
- Dark energy, intrinsic to empty space, is stronger than any other known energy, causing the universe to expand at an accelerating rate, with various theories suggesting its origin and properties.
