Universe Quiz - Hard

A quiz on the universe.
Quiz by
Time123
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Last updated: January 6, 2026
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First submittedJanuary 6, 2026
Times taken281
Average score45.0%
Rating4.00
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Answer
What is the term for a planet outside of our solar system?
Exoplanet
What is the most common type of star?
Red Dwarf
What does a black hole emit?
Hawking Radiation
What is theorized to be at the center of a black hole?
Singularity
The curvature of space time is also known as _.
Gravity
What galaxy is located nearest to the Milky Way?
Andromeda
How many billions of years ago (to one decimal place) did the Big Bang occur?
13.8
68% of our universe is composed of _.
Dark Energy
A cloud of gas and dust in space is called a _.
Nebula
What scale is used to determine how advanced a civilization is (we're currently at .7)?
Kardashev
What are the densest objects in the universe?
Neutron Stars
What is the radiation left over from the Big Bang called?
Cosmic Microwave Background
Approximately how fast is light (in m/s)?
300,000,000
What is the name of the hypothetical particle that can move faster than light?
Tachyon
What particle is forever suspended in a moment of time?
Photon
What is the most likely fate of our universe?
Heat Death
The faster you go in space, the slower you go in_.
Time
Located in the Alpha Centauri system, what is the closest star to us?
Proxima Centauri
What is the gravitationally bound system that the Milky Way, Andromeda and Triangulum Galaxies are located in called?
Local Group
What is the controversial astronomical observation of distant galaxy clusters moving in a unified direction, seemingly pulled by structures beyond our observable universe called?
Dark Flow
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10 Comments
+4
Level 65
Feb 4, 2026
Shouldn't the densest objects in the universe be black holes rather than neutron stars?
+1
Level 58
Feb 4, 2026
I think it mainly depends on the definition being used; I'll try adding it as a type-in though
+6
Level 87
Feb 4, 2026
Couldn't figure out why "Cosmic Background Radiation" wasn't accepted. Is it really necessary to include "Microwave" to prove that you know the answer?
+1
Level 58
Feb 4, 2026
Fair point - if I'm being completely honest, I didn't really know how to add type-ins. If you could give me some advice on how to, I'd be grateful.
+1
Level 49
Feb 4, 2026
for the closest galaxy question, either change the answer to Canis Major Dwarf or reword the question to something like "closest MAJOR galaxy".
+1
Level 89
Feb 4, 2026
A quick google search tells me that the status of Canis Major as a galaxy is somewhat disputed. I think maybe that answer should be accepted, but I think Andromeda is a better definitive answer.
+1
Level 58
Feb 4, 2026
It seems to be disputed so like AlmostAGenius proposed, I'll add it as a type-in but keep Andromeda as the main answer
+1
Level 89
Feb 4, 2026
Agree with Sumguy. I might add a few type ins for that one. I think just “Background” should work for that one. Also, I’m a little skeptical about the dark energy question. Because “composed” means “made up of” some substance, and I don’t think I would classify dark energy as a substance.
+1
Level 58
Feb 4, 2026
Good point - do you have any potential rewordings in mind?
+1
Level 87
Mar 6, 2026
Great quiz, got 18/20.