SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/astro-dark-energy-cosmic-share

Approximately what share of the universe is dark energy?

Dark energy makes up about 68 percent.

Start playing free

  1. About 5 percent
  2. About 68 percent ✔
  3. About 27 percent

Why: The standard cosmological inventory is dominated by dark energy. Dark matter is about 27 percent and familiar ordinary matter about 5 percent.

Huh, didn't know that: Dark energy describes an observed effect, but its physical nature remains unknown.

The dad joke
Dark energy took the biggest slice and still asked for more space.
Like this card?
Play the game

References

Answer: About 68 percent. The standard cosmological inventory is dominated by dark energy. Dark matter is about 27 percent and familiar ordinary matter about 5 percent.

  1. What Is the Universe Really Made Of? openstax.org/books/astronomy-2e/pages/29-5-what-is-the-universe-really-made-of
    The mass equivalent of dark energy then supplies the remaining 68% of the critical density.
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Astronomy & SpaceWhat observed cosmic behavior is attributed to dark energy?Astronomy & SpaceAbout what fraction of cosmic critical density is dark matter?Astronomy & SpaceDid the Big Bang occur at one location inside preexisting space?

That's stuff everyone should know.