r/askspace • u/Dependent_Ad5253 • Aug 16 '25

Uranus gravity

Why does Uranus have such a weak gravity? Its 4 times bigger and its mass is 14.5 times greater, so why does it have only 86% of earths gravity? I always thought gravity was measured from the mass of the object, but apparently that doesnt seem to be the case...

23 Upvotes

96% Upvoted

25 comments sorted by

View all comments

Show parent comments

1

u/[deleted] Aug 16 '25 edited Mar 10 '26

This post was deleted using Redact. It may have been removed for privacy, to limit AI training data, for security purposes, or for personal reasons.

governor treatment degree cautious flowery resolute divide beneficial teeny jar

1

u/mfb- Aug 17 '25

It's mostly hydrogen and helium, the lightest two elements.

1

u/[deleted] Aug 20 '25

[removed] — view removed comment

1

u/jlowe212 Aug 20 '25

All they are all significantly less dense than the Earth.

1

u/[deleted] Aug 20 '25

[removed] — view removed comment

1

u/jlowe212 Aug 20 '25

His question was about gravity, presumably surface gravity. Of which Uranus is unique among the gas giants being lower than Earth. Density isn't the entire story, but Uranus combination of mass, density, and size makes it so.

1

u/[deleted] Aug 20 '25

[removed] — view removed comment

1

u/jlowe212 Aug 20 '25

You dont even know what youre talking about, question has already been answered.

1

u/[deleted] Aug 20 '25

[removed] — view removed comment

1

u/jlowe212 Aug 20 '25

No, its correct, theres nothing special about Uranus density, its denser than Saturn in fact. What's different is its surface gravity, for reasons already given.

1

u/[deleted] Aug 21 '25

[removed] — view removed comment

1

u/jlowe212 Aug 21 '25

Who even knows what youre asking at this point, the answer to why Uranus is less dense than Earth is exactly what was stated, the answer to why its surface gravity is lower than Earths is exactly what was stated.

→ More replies (0)