in space exploration theres sand that you need to turn into glass by smelting it. how would i go about adding the recipe to make the sand into glass?

if you want to modify the mod locally you can ....

add this at the end of the -- SMELTING RECIPES in the file %AppData%\Roaming\Factorio\mods\TheBigFurnace_0.0.9\data.lua
{
type = "recipe",
name = "big-glass",
category = "big-smelting",
energy_required = 3.5,
enabled = true,
ingredients = {{"sand", 100}},
result = "glass",
result_count = 25
}

add this at the end of the same file ...
table.insert(data.raw["module"]["productivity-module"].limitation, "big-glass")
table.insert(data.raw["module"]["productivity-module-2"].limitation, "big-glass")
table.insert(data.raw["module"]["productivity-module-3"].limitation, "big-glass")

add this at the end of the [recipe-name] in the file %AppData%\Roaming\Factorio\mods\TheBigFurnace_0.0.9\locale\en\config.cfg
big-glass=Glass

^^ this worked for me
the only stuff I do not know is how to conditionally add this as a recipe if SE is loaded :D ... I am not that good lol