The universe is mostly composed of invisible matter. Visible matter, like stars and humans, is not the norm. The universe's main components are dark energy and dark matter. Dark matter, which makes up 80% of the universe's gravitating matter, is unlike visible matter but affects galaxies by forming halos around them. Light passes through dark matter, making it invisible. Luminous matter, like us, is considered unusual in the cosmic context.

What is the most abundant form of energy-matter content in the universe?

• Visible matter

• Luminous matter

• Dark energy

• Dark matter

How does dark matter compare to visible matter in terms of gravity?

• It gravitates the same

• It gravitates differently

• It does not gravitate

• It repels visible matter

What percentage of the universe's gravitating matter is believed to be dark matter?

• 50%

• 60%

• 70%

• 80%

Where do galaxies typically reside in relation to dark matter?

• Outside of dark matter halos

• Inside dark matter halos

• Adjacent to dark matter halos

• Above dark matter halos

How is luminous matter perceived in the cosmic context?

• As the norm

• As cosmic weirdos

• As transparent

• As invisible