I have a question about heat/temperature. So, a very massive object like the sun radiates heat and has a "zone" as it were that surrounds the body where the effects of its temperature can be felt. I.e. mercury being incredibly hot and neptune being very cold because of its distance from the sun. So my question is does the mass of the sun most directly influence the size of the heat zone or could a basketball sized object weighing 10kg or so if heated to high enough temperature such as orders of magnitude higher than the sun radiate the same heat that the sun does at the same distance or does the volume of the sun somehow increase the size of its heat field? Like imagine if you heated a 1 gram pebble to 50 trillion kelvin would it radiate enough heat to vaporize the earth? I hope my question is understandable.