minetest.register_globalstep(function(dtime)
	stimer = stimer + dtime;
	if stimer >= 5 then
		stimer = 0;
		local players = minetest.get_connected_players();
		for _,player in pairs(players) do
			local name = player:get_player_name();
			local pos = player:getpos();
			local inspace=0; if pos.y>space_start then inspace = 1 end
			local inspace0=enviro_space[name];
			if inspace~=inspace0 then -- only adjust player enviroment ONLY if change occured ( earth->space or space->earth !)
				enviro_space[name] = inspace;
				enviro_adjust_physics(player);
			end

			if ENABLE_SPACE_EFFECTS and inspace==1 then -- special space code


					if pos.y<1500 and pos.y>1120 then
						local hp = player:get_hp();

						if hp>0 then
							minetest.chat_send_player(name,"WARNING: you entered DEADLY RADIATION ZONE");
							local privs = minetest.get_player_privs(name)
							if not privs.kick then player:set_hp(hp-15) end
						end
						return
					else

						local ppos = protector_position(pos);
						local populated = (minetest.get_node(ppos).name=="basic_protect:protector");
						if populated then
							if minetest.get_meta(ppos):get_int("space") == 1 then populated = false end
						end

						if not populated then -- do damage if player found not close to protectors
							local hp = player:get_hp();
							local privs = minetest.get_player_privs(name);
							if hp>0 and not privs.kick then
								player:set_hp(hp-10); -- dead in 20/10 = 2 events
								minetest.chat_send_player(name,"WARNING: in space you must stay close to spawn or protected areas");
							end
						end
					end

			end
		end
	end
end)