function generateSector() {
        $output = '';
        $planetCount = 0;
        for ($row=1; $row<=$GLOBALS['rows']; $row++) {
            for ($column=1; $column<=$GLOBALS['columns']; $column++) {
                if (mt_rand(1,1000) <= $GLOBALS['planetFrequency']) {
                    if ($planetCount > 0) { $output = $output . "\t\t"; };
                    $output = $output . drawPlanet($row, $column, mt_rand(1,$GLOBALS['planetTypes']));
                    $planetCount++;
                };
            };
        };
        if ($planetCount == 0) {
            $output = $output . drawPlanet(mt_rand(1,$GLOBALS['rows']), mt_rand(1,$GLOBALS['columns']), mt_rand(1,$GLOBALS['planetTypes']));
        };
        return $output;
    }