What powers the Sun deep in its core?

Start playing free

  1. Burning coal and gas like a giant fire
  2. Fusing hydrogen into helium
  3. Splitting uranium atoms apart

🔒 The answer is for AhaBulb members. Members see the answer, why it's right and the official sources for every card of Stuff Every CAP Aerospace Cadet Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. NASA Science, Basics of Space Flight, Chapter 1 science.nasa.gov/learn/basics-of-space-flight/chapter1-1 Checked 2026-10-10.
  2. NASA Science, Sun Facts science.nasa.gov/sun/facts 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