Would the Sun Get Bigger?
Since both the Sun and Jupiter are primarily composed of hydrogen and helium, you might wonder: would the Sun become larger or more powerful after swallowing the gas giant?
In short, not by much. Jupiter is massive compared to other planets, but it’s only about 0.1% the mass of the Sun. Absorbing it would cause the Sun to shine a bit brighter for a brief period, as it converts Jupiter’s mass into energy. Earth would see slightly more sunlight and perhaps even a visible brightening in the sky as Jupiter fades away.
