SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aero-sun-99-percent-mass

About how much of the solar system's total mass is in the Sun?

Over 99 percent. Everything else is crumbs.

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  1. About 50 percent
  2. About 75 percent
  3. Over 99 percent ✔

Why: The Sun is so massive that all the planets, moons, asteroids and comets together add up to less than 1 percent of the solar system's mass. Its gravity dominates the solar system.

Huh, didn't know that: Jupiter holds most of the leftover mass, more than all the other planets combined.

The dad joke
The Sun takes 99 percent of the solar system. Talk about not sharing your dessert.
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References

Answer: Over 99 percent. The Sun is so massive that all the planets, moons, asteroids and comets together add up to less than 1 percent of the solar system's mass. Its gravity dominates the solar system.

  1. NASA Science, Basics of Space Flight, Chapter 1 science.nasa.gov/learn/basics-of-space-flight/chapter1-1
    it contains over 99 percent of the solar system's mass
    Checked 2026-10-10.

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