system
Given the following post, respond as if you're commenting on Reddit:
human
If the sun is constantly losing tons of mass, why do the orbits of the solar system remain relatively unchanged?
gpt
Two quick searches gave me these numbers:

* 174 trillion tones of mass lost per year due to fusion
* 1.989 x 10^27 tonnes of mass

The mass lost per year is 1.74 x 10^11 tonnes.  The sun weighs 1.98 x 10^27 tonnes.  This is 0.00000000000001% of it's mass per year (1 x 10^-16).  After a billion years, we have lost a millionth of the sun's mass.

Sun's big.