The well runs deep
Trivia questions and answers, drawn fresh from the well
239,757 public questions across 1,818 topics. Challenge yourself, or build the perfect quiz for game night.
239,757
Questions with answers
1,818
Topics to explore
3
Depths of difficulty
Today at the well
1 / 5 0
What was the name of the first star known to pass close enough to Sagittarius A* for astronomers to measure relativistic effects?
Answer
S2
What is the name of the first directly observed black hole candidate, discovered in the binary system Cygnus X-1?
Answer
Cygnus X-1
Which galaxy is expected to collide and merge with the Milky Way in about 4.5 billion years?
Answer
Andromeda Galaxy
What is the approximate age of the universe according to modern cosmological measurements?
Answer
13.8 billion years
What is the name of the proposed maximum mass limit for a stable neutron star?
Answer
Tolman–Oppenheimer–Volkoff limit
0 / 5
Round complete
239,757 trivia questions
Every question has an answer
1,818 public topics
Something for every quiz
Free to explore
Reveal answers at your own pace
Fresh from the well
Latest trivia questions
Which galaxy is expected to collide and merge with the Milky Way in about 4.5 billion years?
Answer
Andromeda Galaxy
What is the approximate age of the universe according to modern cosmological measurements?
Answer
13.8 billion years
What is the name of the proposed maximum mass limit for a stable neutron star?
Answer
Tolman–Oppenheimer–Volkoff limit
Which physicist calculated the maximum mass of a stable white dwarf, now called the Chandrasekhar limit?
Answer
Subrahmanyan Chandrasekhar
In quantum physics, which interpretation treats the wavefunction as a tool for predicting measurement outcomes?
Answer
Copenhagen interpretation
Which experiment announced evidence for neutrino oscillation in 1998 using atmospheric neutrinos?
Answer
Super-Kamiokande experiment
What name is given to the quantum state of light containing exactly one photon?
Answer
Single-photon state
Which experiment first demonstrated quantum interference with large carbon molecules such as buckyballs?
Answer
C₆₀ matter-wave interference experiment