I know that we don’t use Star Wars as a bastion of scientfic fact,
but Starkiller base is roughly smaller than our Moon, about 1900km diameter say. The star that the base collapses to at the end of the film is the same size.

Now our sun is one of the smallest main stage stars (i.e. having that yellow colour) that we are aware of, and are aware of being possible for that level of luminance and colour spectrum.

The diameter of our Sun is 1,392,000 km, and would have swallowed up the escaping ships before they could even think about jumping to hyperspace, but whatever…

its really annoying…

repeat:
Starkiller base = ~2000km
The Sun = 1,392,000km